wannabeturbo

Hoping to get to run my car for the 1st time. Its has a stock 5.3l with a tick custom cam btr springs. Has a built th 400 with 4000 rpm stall 3:73 gears
Fuel is 78pound injectors ls1 intake with a 4303 pump running e85
Turbo is a air research 91.5mm with a t6 1.39ar exhuast on 8psi with twin 44mm gates
Tires are small 245/50/16s 555r's
Car is a 3gen rx7 and about 3000pounds

wannabeturbo

Any one have a guess as to what it will/should run in the 1/4mile?

yenkomike

iTrader: (2)

man thats hard to say your build is all over the place. once it spools it will be ok but at only 8# your not even close to the potential of it.


here's my guess.( don't be offended just my guess. )

1.78 60' due to 555r's and slow spoolup
7.30 or 40 @ 95mph 1/8 mile
11.30 @ 124mph . 1/4


not saying it wont run faster just thats what id expect a stock 5.3 with 8# to run.

my guess is it wont make full boost until 2nd gear without a trans brake. it will be hard to get that turbo rocking in 1st gear with the rpm going up fast with your 3.73 gear. it whould be faster with a glide or a 3.0 to 3.2 rear gearing jmho.

JoeNova

Anywhere from 11.2 to 12.9.

Your turbo is huge and oversized and below Its efficiency range, you didn't mention cam specs, and I've had horrible horrible success with the 555r.

If it manages to hook and build boost in first, I still don't think it would crack off anything faster than a low-mid 11.

willizm

iTrader: (10)

Time can be anywhere depending on how well you leave the line but I think it's capable of at least 130mph. If you can leave in boost and cut a decent 60' you could hit mid-high 10's maybe even better considering how light it is. With that big of a turbo on a 5.3l you'd need to work at it to get the boost up off the line. Lots of good threads around here about getting big turbo's to spool on relatively small motors. Only one way to know for sure. Get it out there for some passes.

Nympho

11.6 is my guess unless you somehow get traction.

wannabeturbo

I'm not offended I don't see it being that fast its not an ideal setup. I'd run more boost but being non-intercooled i didn't want to push it too far. It'll make about 1# on the footbrake.

wannabeturbo

How far off would i be guessing the HP at around 450-470 at 8psi

tempoffroad

turn it up a little more. I would think that with e85 even non intercooled it could be quite a bit higher. I would guess around the 450 range. you didnt give many specs on the motor so its all a guess.

wannabeturbo

Cam is 223 223 at 50 intake lift is .617 exhaust is .571 other then the cam the motor is a stock truck 5.3

JoeNova

I would try to squeeze at least 12-14 PSI out of it. 8 PSI it a waste when you're running E85 and a built TH400.

wannabeturbo

Turned it up to 11.6 psi tonight feels a little better on the street we'll see tomorrow what it runs