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VN91SX
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344 Posts
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 Posted - 02 Nov 2008 : 9:01:08 PM
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Hi guys.
Last week i had a set of Pacemaker headers, hi flow stainless steel cat, and straight through 2.5 inch mandrel bent muffler installed in my V6 series II. Happy with the exhaust note (does not have the annoying drone that most sixes have).
Have been doing some research to get some extra grunt and have two options that i am considering, and these options are:
1. Stroker kit
2. Upgrade the cam
I wanted to know what everyone thinks of these options, especially the stroker kit. I am from Sydney, and i am looking for a place that is capable of providing and installing a stroker kit in Sydney.
If i were to purchase a stroker kit from COME Racing in Victoria, is there somewhere in Sydney that anyone could recommend to have the kit built?
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VN91SX
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344 Posts
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Posted - 03 Nov 2008 : 11:53:17 PM
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My mechanic put my new rocker covers on today (polished, fined, and with V6 embosed on them). They look sensational along with the work that i did sanding and polishing the alternator (30 hours worth of sanding and polishing).
Spoke with my mechanic about stroking the motor. He said that stroking is something you would do to an older motor as it is as bigger job as a rebuild. He said that my motor is still young with only 88,000km on it. His recommendation was to put a Group A throttle body (70mm) to replace the standard (60mm).
Purchased a Yella Terra V8 throttle body (71mm) this afternoon and put it on the car. This has made a substantial difference to the car!!!!! Driving the car afterward i found the accelerator to be extremely responsive. I now only require half throttle to get what would have required foot to the floor manhandling before. HUGE difference. The exhaust, tune, air filter, and bigger throttle body have all worked well together to unleash "the beast".
Very happy with the performance of the car guys. |
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trizo
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3091 Posts
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Posted - 04 Nov 2008 : 10:15:50 AM
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| nice m8 very nice... goes to show that you dont need mega bucks to make performance.. |
3 can keep a secret if 2 are dead |
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VN91SX
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344 Posts
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Posted - 04 Nov 2008 : 8:01:24 PM
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Very true Trizz. I would now classify it as an angry six! I think it may have been a V8 in a prior life lol.
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trizo
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crazybiker
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141 Posts
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Posted - 07 Nov 2008 : 08:55:16 AM
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So what have you actually done to your motor to get it?
I'm planning on getting:
Pacemaker extractors and 2.5" exhaust straight through
Oversized throttle body (70MM)
K&N Panel Filter
all installed with a month or so.
What results should that yield? |
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trizo
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Posted - 07 Nov 2008 : 2:06:21 PM
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| a nice note and a bit of throttle response is all you will gain.... a larger throttle wont give you any power ... just response in the pedal.... |
3 can keep a secret if 2 are dead |
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crazybiker
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141 Posts
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Posted - 07 Nov 2008 : 3:14:56 PM
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| But the K&N and exhaust should yield SOME power results? Won't it? |
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VN91SX
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344 Posts
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Posted - 07 Nov 2008 : 6:11:52 PM
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| The larger throttle body will yield an increase of around 10 rwkw. The larger throttle body will work sensationally with the exhaust system you have mentioned, and i recommend a stainless steel high flow catylictic convertor. The ceramic convertors have a habit of burning out, so go stainless steel. The larger throttle body allows increased airflow into the motor, as the standard 60mm creates a bottle neck that decreases airflow rate. The cross section diameter of the intake pipe that attaches to the throttle body is 70mm, therefore the 60mm throttle body decreases the airflow efficiency leading to decreased power output, much the same way as a standard exhaust system decreases air and gas flow out of the motor causing decreased power and performance. If you get the exhaust done, get the larger throttle body, and vice versa, as they work hand in hand to provide a nice sound and improved performance. |
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trizo
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3091 Posts
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Posted - 07 Nov 2008 : 6:15:18 PM
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a larger throttle body wont give you any extra power as you state ,, and 10rwkw!!! Im sorry dude but I fully disagree with that....And also I think you have your method a bit backwards there m8,, It works as follows... the more cold air going into the t/b the more power you will yeid,, There for a cai would realy help it breath, and will give you a few kw's. |
3 can keep a secret if 2 are dead |
Edited by - trizo on 07 Nov 2008 6:18:04 PM |
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crazybiker
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141 Posts
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Posted - 07 Nov 2008 : 6:43:52 PM
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Well, the CAI is coming...but later.
I'm actually with VN91SX here. Alright, maybe it wont achieve 10RWKW, but you'll get improved throttle response, and because you're getting more air into the motor, you get more power.
It might be 3-5RWKW, but it all adds up. Especially when you've got the high flow filter and exhaust with it too. |
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VN91SX
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344 Posts
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Posted - 07 Nov 2008 : 7:28:24 PM
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| Yella Terra 71mm throttle bodies increase air flow by 40% with an overall stated power claim of 10 rwkw. Check out American Autos website and search throttle bodies. Read some forums on CAI and ask yourself these questions. With the increased surface area at the front of a CAI the possibility of taking in more air is increased i agree, but the problem lies in the fact that this increased air flow will not reach the motor as the air flow is limited by the presence of the standard air box that has a inherently smaller surface area for air flow due to the small inlet which i believe would be about 6cm wide. Therefore, what is the point in having a 12-15cm surface area (that is the inlet of a CAI) feeding into a 6cm intake on the standard airbox. K&N pod filters have larger surface area and allow for better air flow, and if you are worried about heat getting to the motor, insulate the pod. |
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VN91SX
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344 Posts
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Posted - 07 Nov 2008 : 7:41:43 PM
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| The principle that i have explained can be simplfified by stating, 9 cars will not fit into 3 car spaces. Therefore if the CAI to Airbox ratio is 15cm:6cm, you can only take in 40% of the air flow. Have you ever filled a lawn mower with petrol. Note the large surface area of the funnel opening and the smaller outlet at the end of it. Have you every noticed how when you pour the petrol into the funnel, that if you increase the flow, the smaller outlet at the end of the funnel can not keep up due to the smaller surface area, which decreases flow causing the funnel to back up with fuel. This principle will also apply with a CAI. |
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VN91SX
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344 Posts
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Posted - 07 Nov 2008 : 7:48:09 PM
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Air flow is number one to a motors performance. That is why forced induction produces such huge performance gains. Enjoying the topic guys  . And i dont mean that in a smart way. Its good to have someone to talk to where we all have a common passion. BEASTY VN'S!!! LOL |
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VN91SX
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344 Posts
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Posted - 07 Nov 2008 : 7:59:39 PM
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| In a way we are all right. Throttle bodies, CAI, and performance filters are all gimmicks that produce little power increase "cheap kilowatts". A custom tune and exhaust provide larger performance gains. I got a qoute today on a cam upgrade. I will start a new topic to tell you guys about it |
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trizo
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3091 Posts
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Posted - 08 Nov 2008 : 01:46:22 AM
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| I still disagree,,, you put your car on the dyno and tell me if you r getting 10kw from a throttle body!!! Dont listen to what the brochure says, sales gimmicks are good but not that good.... and to think you are telling me to read more on these things... lmfao now I have heard every thing.... |
3 can keep a secret if 2 are dead |
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VN91SX
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344 Posts
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Posted - 08 Nov 2008 : 5:54:01 PM
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| I made my point in my last posting. If you want real power gains, you need to do one or more of the following: 1. full performance exhaust, 2. strocker kits, 3. cam upgrades, 4. forced induction, and 5. a custom tune. If you want real power gains and performance then be prepared to part with money in the order of $5000. CAI, throttle bodies, and performance filters are all a **** that produce very little gains, but keep these "cheap kilowatt" companies in strong business. |
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crazybiker
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141 Posts
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Posted - 08 Nov 2008 : 8:16:07 PM
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I will be. I've got planned:
1. The exhaust
2. K%N Panel Filter
3. Throttle body
4. CAI
5. Complete Dyno Tune. |
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trizo
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Posted - 09 Nov 2008 : 1:55:24 PM
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yep ok I did misread your post my bad..... |
3 can keep a secret if 2 are dead |
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VN91SX
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344 Posts
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Posted - 09 Nov 2008 : 8:30:33 PM
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| Not a problem Trizo. As i said, it is awesome to chat with people that have the same interest buddy. I have a question for crazybiker. After the mods you mentioned in your recent post, do you plan on any other performance mods? The only reason i ask this is regarding your final step, the dyno tune. If the exhaust, cai, and panel filter are all you plan on doing, then go ahead and have it dyno tuned, but if you plan on a cam upgrade down the track, then maybe wait until after that to have it dyno tuned. |
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crazybiker
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141 Posts
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Posted - 10 Nov 2008 : 06:41:00 AM
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Yeah I will be, but that'll come much later on. Once I'm off my P's.
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HOT38R
P Plater
71 Posts
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Posted - 10 Nov 2008 : 2:25:19 PM
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definatly not 10rwkw gain, but will increse power slightly.
BTW Stainless steel is not used in the catylitic covertor, it is used as the outside of the cat, it is a spun metallic that is used.
if you are goin to go extractors, shop around for AUScar style, they have larger primarys, i use and a brilliant.
put some magna v6 injectors in as they are larger. CAI. High flowing exhaust 2.5", AUScar extractors, larger throttle body. ive had my flywheel lightened so the revs get up very quickly, smokes lol |
HOT38R |
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trizo
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Posted - 10 Nov 2008 : 2:31:10 PM
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I can c 10kw gain with , exhaust, headers, cai , injectors a larger t/b with a good custom tune...
But at the end of the day u can only tell people so much b4 u r just bashing ya head on the wall.... |
3 can keep a secret if 2 are dead |
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HOT38R
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VN91SX
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344 Posts
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Posted - 10 Nov 2008 : 4:04:28 PM
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| Sounds like you guys must be running some awesome VN's!!! What, 450kw at the rear wheels! LOL. Pretty awesome guys. Nice bunch of people you are |
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VN91SX
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344 Posts
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Posted - 10 Nov 2008 : 4:07:44 PM
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By the way, i never made mentioned that the inside of the catylictic covertor was stainless steel. |
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VN91SX
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344 Posts
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Posted - 10 Nov 2008 : 4:12:52 PM
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| Also, nothing replaces the knowledge of a REAL mechanic, and not someone that cant even spell! LOL |
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VNSVLE
Forum Moderator
1316 Posts
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Posted - 10 Nov 2008 : 7:04:24 PM
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| Comeon now fella's play nice |
What's the difference between understeer and oversteer?
Understeer is when the driver is scared.
Oversteer is when the passenger is scared. |
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VN91SX
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344 Posts
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trizo
Forum Moderator
3091 Posts
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Posted - 11 Nov 2008 : 07:09:55 AM
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| ok here is nice ... topic locked....sarcasim taken on board..and for the record you didnt say anything about a stainless cat.. And just for futre ref the inside of a cat is made of a matrial called platnium,, I also dont have 450kw at my rears... basicaly u seem to think we no fuk all about anything, So y did u ask?? I think your post has come across wrong and from what I could c was a lot of bragging about how you got 10kw from a cat and a throttle body.... ( frankly I think its crap) but thats my opinion... That is the beauty of a open thread... And I also stated that I DID MISREAD YOUR POST... so for now this thread is locked, and we will c if people can take on board other peoples thoughts with out things getting out of hand... peace out for now.... TRIZO |
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Edited by - trizo on 11 Nov 2008 07:19:06 AM |
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