will62085

what do yall think, solid roller 8.4:1 355 with trick flow heads, twin master power t-70's from 1 5/8 headers with 3 inch collectors feeding each turbo.
dual 3 inch downpipes, 96lb. injectors twin 58mm TB

Grind Number L2402-2381-14+4
Duration (intake/exaust) 239/235
Lift (intake/exaust) .604/.601
Lobe Center Separation 114
Intake Centerline 110
Comments HOT LASH .010

Brady

not enough info really, what did you tell them your "purpose" was, I mean what do you expect? what's your desired rpm range? street car? street/strip? weekend warrior?
What kind of horsepower expectations do you have?
I don't guess I understand the "HOT LASH .010" Something sounds wrong there to me, but I'm no expert..

rskrause

Sounds like a winner.

Rich

INTMD8

Sounds like it could be a 1400-1500hp combination.

will62085

more info... its a 6 speed car, street around 10-12 lbs...track around 20-22 lbs on race gas. lookin to take the 6 speed record, 3800lbs, 3.55 gear on a 28 inch tire.

sleepybu

what turbine a/r and waste gates you plan on using

will62085

twin T4 master power T-70's .68ar on exhaust side, .70 ar on compressor side. wastegates are turbosmart 38mm ultragates

SMOKNZ

Seeing as those are MP turbo's I'm assuming that they don't have ball bearing center sections. Have fun getting them to spool with the .69 exhaust housings with a 355. I run PT-61's with the same housings and they spool kinda slow, they approach 4K to make 7 psi (just where I have it gated right now). I may step down to the .58 housings for my turbo's to get some responce back. I run an auto with a 3200 stall converter, can't imagine what they would be like with a stick. IMTIMID8 runs the .69 housings, but he has ball bearing turbo's and I'm sure they spool alot better.

will62085

jose said spool is almost identical to the pt-61's since they are still a small frame turbo, but your right, no BB's. im not too concerned about spool anyway considering i really dont want that much power on the street...just at the track, and its getting some n2o at the track to help that

intimid8-- you used to run non BB turbos right?...how big a spool difference did it make going to BB?

SMOKNZ

Yeah, the N2O should help off the line!

wingnut

How many people are doing this? I am thinking about using NOS to spool up my large frame turbo (see sig site). I could use my DFI to control the NOS and shut it off when the boosted section of the map come up. Has this been working for people.

Right now the car looks like a supra on the dyno...no power...then a 1000rwhp all of a sudden at 6500rpm. It is a BB turbo. 4000rpm stall on mine...I would like to know if the NOS works and how much?

Wingnut

will62085

i think the n2o works exceptionally well to help spool...considering that the lower the rpm, the more n20 will make it into each cylinder...i plan on using a hobbs switch to control mine and cut it off just before full boost

SMOKNZ

I have the N20 partially installed on my car, but have never used it. Spraying out of the hole should help produce extra exhaust which will help the spool. I could use it on the dyno as well, on my old setup I'd hit 18 psi close to 5000 rpm, boost wouldn't build well on the dyno. On the street I could hit that by 3000 easy with an M6 (this was a PT-76 with .85 A/R on the exhaust) A little spray to full boost (or close) and shut it off would work well I'd think.

wingnut

Sweet!!!

Wingut