T2 2.2 to 2.5 conversion how much HP gain?

[cawcislo]

A stock 2.2 t2 has 175 hp and 200 ft lbs
Now if we go to 2.5 with no balance shafts what are we looking at?
195 hp and 230 ft lbs?
My guess? Any opinions?

[TheRock]

HP probably won't change, (it might even drop) but you'll get LOTS more torque by spooling the turbo at a lower RPM. On the street, the 2.5l is TONS more fun than the 2.2 IMHO.

[Shelby VNT]

Probably 155 hp and 215 ft. lbs of torque.

you guys are idiots..

[cawcislo]

If a stock 2.5 t1 makes 150 hp @ 8psi of boost how would a 2.5 t2 with no balance shafts and 12 psi of boost make 155hp?

[glhsken]

Quote:

Originally posted by masterjr33-2 you guys are idiots..

VERY PRODUCTIVE POST

If you are talking at the wheels... VNT is fairly accurate...

[Shelby VNT]

Quote:

A stock 2.2 t2 has 175 hp and 200 ft lbs Now if we go to 2.5 with no balance shafts what are we looking at? 195 hp and 230 ft lbs? My guess? Any opinions?

You asked a very general question. You said nothing about raising the boost, nor intercoolering! I gave a very general answer in regards to the above information.

Factor in a 10 to 15 percent drivetrain loss, and your going to loose about 20 hp in the transmission of power. So yes, 155hp and 215 ft. lbs of torque at the wheels is about right. Numbers at the crank would be around 175 hp and 240 ft. lbs. That's assuming you have a 12 percent loss.

Keep in mind the 2.5 liter is not a horsepower engine. It's a torque engine. It's stroke is longer, torque is it's thing.

Quote:

you guys are idiots..

Merry Christmas to you too pal! Grow up......I didn't see you giving any input on the matter.

[86Shelby]

Well, that bums me out. Not much more hp but a ton more torque. Like my GLHS needs yet more torque to overwhelm the tires. Sounds like the same combo that's going into my GLHS, but with a 555 instead of the 525. Any thoughts about throwing a stock IC, 3" exhaust, MP GLHS LM, Stock Garrett, and 18-20 psi into the mix? Guess I was off base thinking in the neighborhood of 200hp/ 215tq with no extra boost(14psi computer controlled). Oh well, it will still be a blast to drive!:big grin:

Forgot that I'll be using +20 injectors to keep the engine happy while under 14psi with extra injectors for the higher boost.

[glhsken]

Ray,

You sticking 2.2 or going 2.5?? kind of muddled there.

If a 2.2. A fully stock set-up -I/c turbo with a 3" exhaust and a decent sized S/v Rick D 2.5" ported piece (2 7/8" opening) Stage II Glhs Module and +20's (55 psi base pressure, the stage II will handle it) Netted me 101.5mph trap speeds @ 14 psi... Roughly 210-220 at the wheels.

Same set-up but with 18 psi (no extra injectors needed) yielded 108-109mph traps and high 12's. Make sure you use at least a ported ex manifold. Pat Culkin had the same results.

Anytime the boost ramped up to 60 mph, the tires would fry from a roll.

[86Shelby]

Ah, helps if ya know the displacement. It's a 2.5; hence +20s to compensate for fuel. That's why I was bummed out about the large increase in torque. I remember the days before the sick engine frying the tires in 1st and second with long scratches in 3rd and 4th. Stickier rubber here I come!

I do have a ported exhaust manifold, but no larger swingvalve. So the exhaust is the JRB-style downpipe from FWD. I'll be upgrading the swingvalve with a larger turbo later down the road. Cash flow isn't available for much more.

[DakotaKid]

For what it is worth here:

1989 Turbo Van
2.5 Stock
removed balance shafts
ford probe intercooler
17 lbs of boost

171 HP
344 Ftlbs
(on the dyno, at the wheels)

http://www.rockracing.com/pics/dyno.jpg

-Bryan

[laserxe84]

Another for what it's worth:

'89 Daytona tII/A555

-'91 2.5l short block with balance shafts removed
-Stock Head and Intake/Exhaust Manifolds
-Turbo... 70 trim GN Compressor Wheel and .48 A/R Exhaust Housing
-Stock Daytona Intercooler
-Stock '89 tII SMEC
-Stock tII Injectors
-Adjustable Fuel Pressure Regulator (forgot what setting was used)
-2.5" mandrel bent exhaust with Magnaflow cat and muffler
-One VW cold start injector set to turn on at 15psi
-Graingered to 16psi Boost

DYNOJET RESULTS (at the wheels):
193.6 HP at 4000 RPM
258.6 ft-lbs at 3750 RPM

Justin

[Garret]

Shows how much the stock intercooler really is a big restriction

[BadAndy]

Stock 2.5 motor 91 Daytona Shelby

very slightly ported exhaust manifold
t3/t4 hybrid 50 trim stock compressor housing .63 exhaust/stage II wheel w/2.5 swingvalve
full 3" exhaust (no cat)
cummins intercooler
underdrive pulley
+40's
52mm t-body
Relentless cal
balance shafts removed

Running 22lbs. boost w/race gas and figuring by race weight (estimated...most likely much heavier than guess of 3,000 w/me in car)

by mph: 269 to the tire
by e.t.: 270 " " "

so figuring driveline loss I'm guessing 285/290 crank.

Not bad concidering the motor had never been uncorked until I put the turbo on. I'm guess somewhere in the 160,000 mile range (instrument cluster was replaced by dealer without it being calibrated) so I really have no clue of mileage.

My goal was 300 crank horse and a 12 sec. 1/4 on a stock longblock. A trip to the scales for weight verification and another trip to the track to bang off a 12 (best is 13.07) and I obtained my goal.

My hats off to Gary at Relentless......could never have come close without him.

can i ask you guys how that feels?? 300 ft lbs of torque ??? and how the hell do you keep the tires from spinning.

is it weak on the top end ???? im curious because im looking at a daytona with a possible mashed piston. and i was wondering if the 2.5 short block was the way to go. but i want to know if its weak at higher speeds.

to have all that torque....... aahhhhhhhhh. thats axle busting torque.