TTvet

Hi!

Which camshaft you twin turbo recommend for me?
I have the TTIX turbokit with Precision 6266's.

Thanks!

ratt_finkel

www.briantooleyracing.com

Why go anywhere else?

Turbo-Geist

Need more info. Engine displacement, cylinder head type, intake, compression ratio, desired horsepower and planned use for the vehicle would be a good starting point. Also, manual or automatic?

Chris Stewart

I run the Comp Cams LSR Turbo. It was recommended by my tuner. It's kinda mild but I think it does a good job.

http://www.compcams.com/Company/CC/c...csid=1425&sb=0

TTvet

Thanks guys!

It's a 383cid LS1 with Lingenfelter ported LS1 head.
LS6 intake and 9:1 compression.
Desired horsepower is around 700-800whp and will be used daily.
It has an RPM stage X 4L60E transmission.

I've been thinking the Lingenfelter GT9 camshaft but I'd like to hear some real life experiments from this and other brands too.

Rkreigh

check with dr phil too he knows about as much about the tti system and has a good tune on my car with the rpm tranny

I dropped the car off with rodney and phil drove down from michigan and also straightened a few things out gratis

rodney helped me sell off the old manual rpm parts and the who shebang only cost me 2500 for a killer upgrade

tranny many years later still shifts like it did and runs cool

thanks rodney and dr phil!!!

Chris Stewart

same tuner

JDS99

FWIW, this is the cam Tooley spec'd for me. Got tired of the big cam, and told him I wanted good street manners but not choked off before 7k. General specs are 8.75CR, 402, LSA heads, LS3 manifold, and for a pair of T4 billet 64/68's. Haven't driven it with turbos yet, just NA. So can't report on any results.

**edit. For clarity it's ground straight up because my timing set is advanced 4deg. Originally spec'd to 116+4

BLOWNBLUEZ06

Hopefully Inspector12 chimes in. He's got a lot of real-world experience with turbo cams in various LS applications. If he doesn't, PM him and tell him Bret said for him to jump in.


a lake!

5 Liter Eater

Interesting. This is the cam Brian spec'ed for me. 408, TTIX with 62/65's, cathedral heads, LS2 intakem, 9.5:1 CR. Pretty close to yours with less lift and less LSA for some reason. It's done well but I might change it up with the 422 LSX I'm building. Maybe a reverse split. I still think more can be done to quell the extreme backpressure of the TTIX kit.

cmiller8006

I have a very similar cam specd from him for my 383

TTvet

Does the TTix kit have back pressure problems because of the small diameter downpipes?
I though they might become a problem when I first saw them.

I believe the bigger lobe separation helps with the back pressure.
The more overlap the bigger exhaust side (including turbine wheel and housing) is needed.

Brian Tooley cams look very interesting as well as the Comp Cams.
Also the Lingenfelter GT9 has nice numbers on it.

5 Liter Eater

It's a bunch of things IMO. Restrictive T3 housing, small a/r (.82 max), log manifold. I put 3" downpipes on and didn't gain much until I put cutouts on which added ~100 RWHP. There's backpressure pre and post turbo.

TTvet

Has going to the PT6266 turbochargers instead of the Turbonetics 6265's helped any regarding this issue?

Which of these turbos have had better results regarding the HP?

Rkreigh

I'm going to upgrade to the .82 housings, and champion downpipes

looking for a good exhaust solution that will run the flappers for quiet crooze with also the option for dumping ahead of the mufflers

I'd like to go 3" all the way and may have a local gent fab up a custom bent system as the options look expensive and I believe he can do a custom system for the same price

what do you all use for the NPP exh flapper controller?

I thought (no joke) about some simple cables we use out of model airplanes they are a tight braided cable inside a nylon tube very stiff and light but unfortunately not long enough so I'd have to tack some of them together

just looking for a simple "on and off" solution that is light and reliable and the vacuum cans are a pain

Turbo-Geist

It looks like there are enough cams in this thread alone to do a proper twin turbo C5 corvette cam shootout. Who's going to provide the dyno mule?

The 6266s are Precision's replacement for the 6265s. On paper they show to flow more than the 65's. Since Precision doesn't have any published compressor maps, it's hard to make a comparison. I think you can only get the 6266s with a 0.63 A/R housing, but I'm not sure.

Straight 3" is recommended for max effort. Alternatively you could do electric cut-outs. Which mufflers are you planning to go with?

Rkreigh

I haven't decided on the exhaust but looking at LG or the new 3" corsa or B&B

I might just keep the 2.5 system I have now and do the cut outs as I think they would provide a better bang for the buck

I'd also like to try and the "c6 mod" to straighten it out.

not worried about hacking up the fiberglass, I hate the c5 exh design and the engineers recognized this too.

any recommendations on mufflers if I go with a pure custom setup?

I have a very good custom fabricator who would likely charge about the same as an off the shelf.

algZO6

Corsa has a new 3" exhaust? Have a link?

95vettski

I've seen great results with a dual pattern cam. I would suggest something like a 228/228 116+3
Check with Rob@Champion Motors he has plenty of experience with ttix kits.

Rkreigh

no, not even sure it's out for C5s at all , but they are working on 3" kits for C6's and with mods to the rear well (a hack) you can put c6 stuff in a c5

it straightens out the exh without the goofy 180 bends in and out of the mufflers.