Supertech valvetrain package ??

[Sniper1st]

Hey, I'm building my RB26 and looking at Supertech products
saw this package which is really a good deal:
http://ipg-supertech.com/cart.php?ta...category_id=68


Valve Spring and Titanium Retainer Package ------- SPRK-ts1015/rb26
Supertech Complete Valve set 1.00mm oversize ----NIVN-1032, NEVI-1032
Supertech Bronze Valve Guides --------------------GDE-NSR7-ET

Tomei cams 272 lift 10.25
will be revving 8800 rpms 800+whp

do you recommend using this set up, any bad experience, anybody running them ??
are above parts enough? what do I need more

does it worth going 1mm oversize valves??

[Red R Racing]

Originally Posted by Sniper1st

Hey, I'm building my RB26 and looking at Supertech products
saw this package which is really a good deal:
www.IPG-Supertech.com - Supertech Performance Valvetrain


Valve Spring and Titanium Retainer Package ------- SPRK-ts1015/rb26
Supertech Complete Valve set 1.00mm oversize ----NIVN-1032, NEVI-1032
Supertech Bronze Valve Guides --------------------GDE-NSR7-ET

Tomei cams 272 lift 10.25
will be revving 8800 rpms 800+whp

do you recommend using this set up, any bad experience, anybody running them ??
are above parts enough? what do I need more

does it worth going 1mm oversize valves??

Supertech produce Tomei valves, as ive had both here on the shelf brand new in boxes. They are exactly the same product, the guides, springs and retainers appear to be different but still work ok. Considering you are only revving to 8800rpm they should be fine for your application.

[andy@amt]

You won't go wrong with supertech stuff go 1mm on the exhaust side.what turbo are you going to be running

[Sniper1st]

Originally Posted by Red R Racing

Supertech produce Tomei valves, as ive had both here on the shelf brand new in boxes. They are exactly the same product, the guides, springs and retainers appear to be different but still work ok. Considering you are only revving to 8800rpm they should be fine for your application.

You won't go wrong with supertech stuff go 1mm on the exhaust side.what turbo are you going to be running

thanks guys, you mean on the exhaust side only,, why!!
I've BW 91-79 turbo rated 830whp I'm going to max out this turbo





any more input

[TurboSE]

wow...good find, thank you.

This package, B Poncams...6-700 street whp...any suggestions? Was running a T78 before the rebuild...

[RBJETT]

Exhuast gases are less dense than inlet mixtures thus take up more space, to keep good flow exhuast valves need to be bigger

[TurboSE]

Originally Posted by RBJETT

Exhuast gases are less dense than inlet mixtures thus take up more space, to keep good flow exhuast valves need to be bigger

I understand the +1 on the exhaust side as I'm sure the OP does, the puzzling part is that Supertech seems to offer this package as +1 on both In and Ex...I emailed them to check.

[RBJETT]

I must have misunderstood what sniper1st ment when he questioned only having oversize valves on the exhuast side

[TurboSE]

I haven't received a reply yet, any idea why they'd go 1mm+ on both In and Ex?

[andy@amt]

The trouble with the gtr head is the exhaust ratio is way down on the inlet for a turbo cylinder head this is why I said put bigger exhaust valves in, you can put oversize inlets in but unless you mod the port right it won't make much improvement for the cost of doing it.

[Sniper1st]

so what you mean is putting 1mm oversize on the exhaust side only, will be more gain than getting 1mm oversize for both sides

so intake side will remain stock, stock guides, or have to change

thank you

[black bnr32]

Originally Posted by Sniper1st

so what you mean is putting 1mm oversize on the exhaust side only, will be more gain than getting 1mm oversize for both sides

so intake side will remain stock, stock guides, or have to change

thank you

I thought andy meant +1mm intake is still smart, but only if you have the head apart already.

is it recommended to remove the intake squish pad if going +1mm on both sides?

[andy@amt]

What Iam saying is unless you mod the inlet port enough putting 1mm bigger valves in will not see a big increase for the money it costs, don't leave the standard guides in fit the supertech ones.

[Sniper1st]

ah thanks guys
thank you so much Andy for ur helpfull input

[TurboSE]

So, before i order (sorry for beating a dead horse), I'm just getting the exhaust valves from Supertech, and sticking with stock intake valves.

Should I get in. and ex. valve guides and seals from them (they'll work on the stock in. valves correct)?

I'm also unsure about springs. I can't find specs on Poncams (B) to help me decide. I've heard of wear issues with duals, but I don't know that it'll be an issue with the small amount of street use the car will get.

Spring specs from Supertechs site