tkHBseries

Just dyno tuned my car last night and was wondering what could be wrong? The numbers are pretty low for the setup and im just trying to figure out the bugs.

Setup:
b18c1 std bore RS sleeved
CP 9.8:1 pistons
Eagle Rods
BC Ti retainers/dual valve springs
GSR cams
S372 std cover
PTE 46mm WG
Ram horn
4inch DP
3inch IC piping
31x11x4 IC



Fuel:
-8 feed
-6 return
Aeromotive AFPR
Dual walbro Full Blown kit
Bosch 1600's

Ignition:

MSD 6al
cap
SS blaster coil
NGK #8

Car dynoed at 552whp @ 27 psi and 318 tq.

These numbers seems really low to me any ideas, im going to check for boost leaks and WG leaks. Any other guys with S372 I would love to hear inputs and results.

tkHBseries

^^^^ this was on C16 at 43psi base fuel pressure.

92redhatch

That sounds like a similar problem I had I made 587whp 411trq on a 6765 at 28psi. Turned out to be 12 boost leaks

tkHBseries

Man that is pretty similiar. Have you retuned/dynoed after resolving the boost leak issues. I just want to compare the differences?

Muckman

iTrader: (2)

Can you post the dyno graph and boost log?

Why GSR cams?

92redhatch

I haven't taken it back to the dyno. But a very similar setup as mine, same turbo and bore/ stroke at 27psi made 800+

92egkirt

Boost leak can play a major factor in this, Had a buddy run a very similar setup to yours aside from (84mm) 9:1 Pistons and PTE6765.He Had a small boost leak around a coupler, fixed it and went to retune and gain 7-8 Whp. His setup makes around 670whp @ 20psi (still got acouple of bugs to work out). Also on a Gsr Cam

jdm inc

iTrader: (11)

I ran an s372 made 765@34lbs!
I didnt have my car properly aligned and it only made like 600 at like 30lbs and we aligned the car and boom jumped up too 700- That was my issue.

here was my setup.
Block
Golden eagle sleeved b18c
Arias 9.1 pistons
Eagle rods
Micropolish gsr crank.
Oem bearings

Head
Gsr head stock port
Skunk2 pro1 cams and gears
Rev valve train
Victor x manifold ported to 74mm.
Rpm service 74mm TB
Oem timing belt

Turbo
BW s372 w/race cover
Twin Tial 44mm WG
SLS topmount
4”Downpipe
SLS Custom backdoor intercooler 24x12x3.5
Tial 50mm BOV

Gsr lsd tranny
Exedy twin disk clutch
Diest tranny blanket

Electronics
Hondata s300
Plx m300 wideband
Msd digital 6 For now.

Suspension
PIC. 12k F 18K B
Traction bars
Blox rear lower control arm
Innovative solid mounts

Fuel
-10 Feed -8 Return.
Dual bosch 044’s
ID 1000cc injectors
AEM Fuel rail
Weldon fpr

TheShodan

iTrader: (14)

Check for massive leaks..... Then when you finish that, re-check again.

tkHBseries

When you say "align" you mean suspension alignment right?

Picture of Dyno graph coming in a bit

tkHBseries

Here is the dyno graph

Let me know what you all think!

Muckman

iTrader: (2)

Very laggy. You dont make your peak torque until 8k.
Keep in mind these are uncorrected numbers.

tkHBseries

Big time lag!

Really wanted to go with Pro 1's but funds drained so had to settle with what I had available for now.

tepid1

It's laggy for a few reasons....

Small bore, I'm assuming GSR stroke, GSR cams, prob no head work....
It all adds up. Sounds like a possible boost leak issue too.

Who's tuning this and on what EMS?

JDM INC, I made 930 at 36ish. Sounds like you had issues too. lol

jdm inc

iTrader: (11)

like toe alignment. ex toe in toe out.

jdm inc

iTrader: (11)

i was on stock ported head stock size valves. and 81mm bore

turbociv910

alignment has a big affect on power.


boost leaks. exhaust leak.

tepid1

That explains it. Also, I should add, my number was only at 8500rpm. lol

artie89

iTrader: (4)

we just tuned my boy car with a s372 on 27psi he made 751hp 462tq we did run into a problem on the dyno with the intercooler hitting the wastegate nipple and putting a small hole in the intercooler causing the car not to make more then 575 no matter how much we up'd the boost here his setup

stock ported gsr head
stock size skunk2 valves
supertech spring and retainers
skunk2 pro 1
edelbrock victor x with 70mm throttle body
darton sleeved 81mm gsr block
je piston 9.5.1 cp
brian crower rods
gsr tranny cc twin disc
full race twin scroll top mount manifold
2 44mm tial wastegate
s372 with race cover
ebay intercooler after we put a hole in the godspeed intercooler
id2000
s300 with cpr box
sump stock tank -10 feed -8 return dual bosch 044
c16

jdm inc

iTrader: (11)

Nice!

tkHBseries

Update! I finally had a chance to dig a little deeper and did a boost leak test. Found out the Tial Bov gasket tore and was completely gone, so pretty much metal on metal with the flange. Second was the throttle body had a minor leak as well. All in all, the majority of the boost was blown out of the BOV flange and never made it to the TB. I am pretty sure this had a major affect on HP and TQ numbers, how much? I dont know...if anybody has a clue throw out some values. I will have to redyno again...that means more $$$$

tkHBseries

Nice setup...pretty similar. I have more hopes now in the s372. How "laggy" was it for your setup...what rpm for peak boost, and tq?

tkHBseries

DSR are the tuners

Running s300 with boost control

artie89

iTrader: (4)

the turbo came on hard around 6200 rpm

92redhatch

Your very welcome now go make more power