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Nijell
P Plater
49 Posts
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 Posted - 28 Jun 2007 : 9:37:57 PM
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i read in street machine that if u put a set of yella terra roller rockers (im not sure which ratio) and slap some tri-y pacemaker extractors on ur pre eco-tech V6 (VN-VP-VR). u gain an extra 10 rwkw on a totally stock engine! i looked at the price of roller rockers for my VN V6 and they're up near the $1000 mark! but for the 5l V8 they're only $300. that just doesn't seem right, does anyone know if the two are interchangeable? or if any other roller rockers will fit into the buick?
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nodg
National Driver
1667 Posts
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Posted - 28 Jun 2007 : 9:58:46 PM
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| roller rockers basically allow your valves to open more, letting more fuel/gasses in and out and reduce the amount of friction that is in your valvetrain, thus making you more power(revving up quicker and more effortlessly), but to get the full potential from head work and the like you have to do the basics first, the motor will be working more efficiantly so it wants to breathe in and out faster, exhaust, pod, throttle body, porting and polishing, after you have all your mods in place you would either buy an aftermarket computer system or programme the old 32bit memcal. |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 28 Jun 2007 : 10:49:05 PM
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| the yella terra are a bit over priced arnt they !!! but as nod said they will make the difference if your setup right! ;) |
3 can keep a secret if 2 are dead |
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MILD50
Fully Licenced
850 Posts
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Posted - 29 Jun 2007 : 10:15:19 AM
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Keep in mind all the different variants of roller rockers available from Yella Terra- they run from very cheap to very expensive.
I think I paid about $500 or $600 for mine, I wouldn't expect to pay more for the six cylinder jobs... call Yella Terra direct and ask for a price for the V6 Street Terra adjustables. |
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trizo
Forum Moderator
3091 Posts
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Posted - 29 Jun 2007 : 4:25:58 PM
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| there about $1500 from the last quote I got of them!! |
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thunderstruck
P Plater
16 Posts
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Posted - 29 Jun 2007 : 10:08:20 PM
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| has anyone tryed bolting on the ecotec rockers, do they fit? |
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trizo
Forum Moderator
3091 Posts
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Posted - 30 Jun 2007 : 02:05:03 AM
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| nope ! but I'm fairly sure they arnt interchangable!! can any 1 confirm this? |
3 can keep a secret if 2 are dead |
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nodg
National Driver
1667 Posts
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Posted - 30 Jun 2007 : 02:29:58 AM
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| even though the motor is basically a 3.8, the internals were much differant,ie-pistons and gudgeon pins, valve shape and head port shape,etc. it is very unrealistic to interchange buick parts with ecotec parts. i cant see there being any performance gain if thats what your after, a port and polish is your cheapest and easiest option by the sounds of things. |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 30 Jun 2007 : 02:31:30 AM
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| thats wat I thought the eco tec's are a whole nother ball game ! It was realy only the vn-vp that were interchangable, ( I think)... |
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nodg
National Driver
1667 Posts
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Posted - 30 Jun 2007 : 02:32:07 AM
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| and its not surprising that the v6 parts are more expensive because v6 performance parts are quite rare compared to v8 parts |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 30 Jun 2007 : 02:33:50 AM
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| speakin of a port and polish @nod have you had 1 done and wat did it set u bak??? |
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nodg
National Driver
1667 Posts
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Posted - 30 Jun 2007 : 02:40:14 AM
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| i cant say an exact price because i never paid for one but it would be around 1200. theres alot of science in building a motor, thats why we see some cars perform better than others of the sort. in this part of engineering a motor you need to sit down and asses how your going to shape the valves and manifold to optimumly deliver(swirl) the air to the combustion chambers. |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 30 Jun 2007 : 02:41:29 AM
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| ahh dont know much about the port/ polish side of things, cheers! |
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nodg
National Driver
1667 Posts
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Posted - 30 Jun 2007 : 02:46:10 AM
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| just thought id explain it to let you get the jist of what a port and polish is. |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 30 Jun 2007 : 10:37:37 AM
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| if ya getting the port and polish it would be worth chukin in a set of forged pistons hey?? That with a set of good roller rockers, lumpy cam ect... |
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Jack Trader
P Plater
11 Posts
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Posted - 30 Jun 2007 : 2:54:20 PM
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| I've never fitted roller rockers to a V6 or mucked about with performance V6 heads, however experience with other engines leads me to emphasize the importance of checking all valve train geometry when fitting non-standard parts. High lift cams, different ratio rockers or larger valves, all have potential to cause problems. Be sure to check that there is no interference between valves and pistons, that valves springs don't bind, and that standard pushrods are adequate. Also be careful doing anything that gives the valves more lift on a worn or carboned engine, valves can stick open and thats bad news. |
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MILD50
Fully Licenced
850 Posts
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Posted - 01 Jul 2007 : 09:30:31 AM
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I don't know where you got that quote from Trizo and what it was for but I find it extremely hard to believe that there is $1000 difference between a set of roller rockers for a V8 and a V6... I've got my receipt for mine at home so I'll check that in the next couple of days- it was $500 or $600 that I paid direct from Yella Terra. Definately not anything close to $1500.
That was for adjustables aswell. I'm searching the net now to see if I can find a price for the V6 kit. |
Edited by - MILD50 on 01 Jul 2007 09:34:02 AM |
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MILD50
Fully Licenced
850 Posts
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Posted - 01 Jul 2007 : 09:47:09 AM
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americanautos.com.au
Yella Terra Roller Rockers p/n:YT6306
VN-VS S1- Adjustable 3/8" Twin Shaft
1.65:1 ratio
$809
Street Terra would be ever cheaper- I'd suggest by as much as $200 cheaper- and be perfect for what you are after. Street Terra aren't quite as high quality but are perfect for street cars that aren't modified off tap... I run them on my 5litre with pretty extensive top end mods- CBF listing it all here- and they haven't given me any dramas.
I'd go adjustable just so that you don't have to dick about with shims etc... but you'd get them even cheaper non-adjustable if you really are on a budget (and there's nothing wrong with that!) |
Edited by - MILD50 on 01 Jul 2007 09:48:20 AM |
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trizo
Forum Moderator
3091 Posts
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Posted - 01 Jul 2007 : 10:25:58 AM
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| that quote was from super cheap mild 50!!!! |
3 can keep a secret if 2 are dead |
Edited by - trizo on 01 Jul 2007 3:51:53 PM |
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MILD50
Fully Licenced
850 Posts
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Posted - 01 Jul 2007 : 10:39:52 AM
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Mate- I've just proved that you can get them cheaper than that.
There is a whole range of roller rockers available from Yella Terra- let alone other companies- and they vary in price wildly.
I'm not accusing you of lying- I'm simply stating that $1500 is a bollocks quote and if someone told me that I would tell them to go forth and procreate. Its a rip off and inaccurate. |
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trizo
Forum Moderator
3091 Posts
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Posted - 01 Jul 2007 : 10:53:13 AM
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| thats y I didnt buy them and thats y I put that quote up so other users could see ! $1500 is at the xtreme end of the scale but thats wat it was!! |
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MILD50
Fully Licenced
850 Posts
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Posted - 01 Jul 2007 : 11:21:29 AM
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| Ok. Well to the original poster- if you're going to buy them don't go to Supercheap :) |
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trizo
Forum Moderator
3091 Posts
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Posted - 01 Jul 2007 : 4:03:59 PM
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| lol !!! have a look at the yella terra website they have all there prices there!! |
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MILD50
Fully Licenced
850 Posts
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Posted - 01 Jul 2007 : 4:06:50 PM
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Couldn't find prices on the yella terra site?
Where abouts are they because it would make shopping a hell of a lot easier.
(Those platnium rockers look porn!) |
Edited by - MILD50 on 01 Jul 2007 4:09:32 PM |
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trizo
Forum Moderator
3091 Posts
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Posted - 01 Jul 2007 : 4:12:29 PM
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| I thought they had the prices !!! I know they have just updated the site !! hmmm get bak to ya on that 1??? |
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trizo
Forum Moderator
3091 Posts
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nodg
National Driver
1667 Posts
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Posted - 01 Jul 2007 : 6:51:27 PM
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| instead of you going to yellaterra or one of its retailers, your buying the same part but its been bought buy supercheap then they add their profit to the price so naturally it would be more expensive |
Cheers,
Nodg. |
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trizo
Forum Moderator
3091 Posts
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Posted - 01 Jul 2007 : 6:54:04 PM
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yep it was just an example! ;) of how you can get over quoted for these sorts of things!
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SV3800
P Plater
12 Posts
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Posted - 01 Jul 2007 : 7:10:22 PM
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| the quote i got for a set of rockers for a vn s2 onwards part no. YT 6659 i think was something like $610, and that wasnt through yella terra direct because they were alot more, i went through some people called ClutchKick, they were pretty cheap i thought and sell alot of other aftermarket things too |
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