Jeengo

Hi Folks,

I have a question,

I have a 951 with the following mods on it and I am not seeing the performance advertised by Lindsey Racing.

The car has everything in the LR 340WHP kit

Mafterburner
67mm turbo
DP WasteGate
Manual Boost Controller
55lb Injectors
LR Chips
3" Exhaust with 3" Downpipe
UEGO2000 WBO2
3.0 Bar FPR

I was having tuning issues with the mafterburner, so I replaced that with the PSC01-004 from split second.

I was only able to get 297whp with the mafterburner (19psi), I replaced it with the SplitSecond unit and tuned it perfectly as you can see in the dynosheet. I only gained 13WHP total after the tune but gained about 30WHP in the 4000+ range. The SS unit gave me a total of 310WHP (19psi) with a close perfect A/F ratio and the car literally drives like a new car, no stumbling, idles great and has no hesitation.

My question is why am I not seeing the numbers LR advertises with their kit. Also seems kind of low (WHP wise) considering what mods the car has.

My compression is 148, 148, 145, 148 (also performed a leak down test...flawless)
I don't think its a fuel delivery problem since the A/F is spot on.
I doubt its the MAF or airflow problem, again A/F doesn't indicate that as a problem.
Boost does not drop at all (i have an Autometer data logging boost/vac gauge)

What I suspect to be the problem is

Possibly something in regards to timing, maybe in the chips?

What would be an expected Wheel Horse Power figure with the above mentioned mods. The car runs great and I am suspect of the dyno sheets and figures all these sites are conveying to the masses. most of the sites are indicating more than 300WHP on cars with just chips and higher boost or chips exhaust and MAF.

I would really appreciate any and all suggestions/comments in regards to my problem.

God Bless

odurandina

could the numbers you're seeing be resulting from, 1. stingy Mustang dyno? can't see the image. 2. normal aging of the engine? i guess not likely with those compression numbers 3. therefore all we're left with is a stingy dyno or tuning? i realize being down 10 % on hp is disappointing, but could it be the dyno ? how does the car drive ? i bet the answer is near the ++ side of great. guess you should be leaning towards tuning.

Jeengo

Hi thanks for your reply the dyno was done on a dynojet and it drives great, fantastic i should say, I forgot to mention that the engine is dry sleeved ( want to eventually boost much higher)...roughly 2500 miles ago.

I also forgot to mention that the turbo is a GT35R ceramic ball bearing turbo.

Every seal and gasket was replaced, thats why I have great compression and leak down results.

God Bless

Jeengo

Ill have pictures of the car soon.

All mods:

2.5L dry sleeved rebuilt motor (original motor, just sleeved and seals gasket change)
GT35R Ceramic ball bearing turbo
Split Second PSC01-004 Piggy Back Controller
55lbs Siemens Injectors (w/ 1ohm 50 watt ballasts for good measure)
Spec Stage 3 clutch
Bilstein Escort Cup Coilovers W/ Hypercoil 400lbs Front and 550 LBS rear (torsions removed)
Ground Control Camber Plates
LR Stage 2 MAF
LR 951MAX Chips
Adjustable FPR (set at 43psi)
Manual Boost Controller
Mallory 2 Stage Launch Control
3" Exhaust
3" Downpipe
Full Vband Turbo setup for 30 minute turbo change/replacement
LR Dual Port Waste Gate
Uego2000 Wide Band O2

I am probably forgetting some stuff but I'll edit this post if I do forget to list a mod.

God Bless

Paulyy

Id be looking at the tune.
That's a big turbo for our engine.

Jeengo

Hey paulyy I uploaded a picture of the dyno what looks wrong in that?, I couldn't get the tune to be any better than that.

The A/F and the power curve looks really good to me, as far as the dyno run was concerned. I know a port and polish would give me much better results, however I am wondering why I am getting such low WHP (or am I) with the setup I have.

God Bless

odurandina

sorry for not mentioning that i'm not a turbo guy. i just read most of their threads. and i'm up late. i'm back to thinking about it's simply a combination of an older engine, and tuning. is it recently rebuilt or are you nearing more towards the midlife on mileage? if so, you're numbers look ok. no cat right ? are you running a straight through/glasspack/magnaflow design or lesser quality muffler ?

btw, i would love to see one of you all switch to from a dyno run with 15w50 synthetic to the M1 0w50 racing oil.

i'm running half and half of 0w40 and 0w50 for the winter.

Mobil claims the racing oil makes more power. woud love to see that with one of these engines.


;

Jeengo

The engine is roughly NEW 2500 mile or so, total miles on the car are 100K.
I am running straight through.

What I did to the engine, all of this was done 2500 miles ago:

Sleeved the block
New piston rings
New main and rod bearings
New wide fire gasket
Matched pistons to rings to sleeves on a per cylinder basis.
New seals
New Piston rings
Resurfaced block and head (very little was taken off, well with in specs
Basically a new motor

I have pictures of everything I have done I try to post it all soon.

thanks for the replies, guys

God Bless

333pg333

The turbo is too big for the a stock motor. I would guess that if you ran E85 with commensurate tune at 25psi where that turbo is getting into stride you might see an exponential improvement....until the headlifted and headgasket leaked. But for one or two pulls, who knows....oh and you'd also have too much backpressure with the stock head, i/c, i/c pipes, headers, cam etc....
imho of course.

Van

Maybe Lindsey Racing is advertising crank HP... not wheel HP. Or, maybe they're just stretching their claim a little bit. Last year I dynoed a bunch of cars, all in various states of tune, and we were surprised to see that while several people "thought" their cars were over 300 WHP, none actually were.

Paulyy

i looked at the dyno, it looks like it eases into full boost. you're defently not using the turbos full potential. like pat said, 25 psi on e85 and you'll probably see a larger increase in power.

I'm probably makeing around 300-320 rwhp with my turbo between 14-17 psi but i need to push the turbo to 25 psi also to see a huge amount of power

HJK

Intercooler capacity? is it clean? Check it out, easy check. I lost and found over 40 whp due to clogged intercooler.
Henk

racerxrick

such a difference between dynos.

My numbers were right what Lindsey predicted at low boost (haven't upgraded the inj's). I run their Super 53 turbo and the supporting mods...despite vacuum issues causing a pig rich condition down low I made 297rwhp @14.7psi. LR predicted 310 at 15.

Not sure which turbo you have...

JohnKoaWood

Changed over to a JPEG.. here is the chart..

Turbo not reaching peak boost till over 4500 RPM?

Turbo is a bit on the large side (GT35) for the motor (2.5L).. likely OUT of its efficiency range which WILL hurt over all performance...

Injectors should be fine for the HP goals, timing is likely slightly retarded... but not likely retarded enough to be costing you 30Hp.. it would be noticeable if it was retarding due to knock..

If I had to venture a guess, I bet you would get better spool (by 2000 RPM or so), and better over all performance from a slightly smaller turbo (GT3076 or even GT3071..)...

otherwise it is an artifact of the dyno, and the bouncing of the graph once boost target is reached is likely the WG fluttering...

Jeengo

Good suggestion Henk,

I will check the intercooler, I doubt it is filled with oil since the has never burned any oil outside of the normal 1 quart every few months.

I have ABSOLUTELY no smoke out the tailpipe even when cold.

One thing i did notice though is a huge amount of pressure and turbulence out the tailpipe. I mean you can feel air hitting you 7-9 feet behind the car. Some have told me this is good since air is flowing out well, some have said its bad since its turbulent.

I appreciate everyones responses/suggestions.

God Bless