Will a 2.5 TBI live with a stock turbo conversion?

[Force Fed]

Can I put a complete stock conversion turbo I unit (hard parts, turbo, electrical, etc) on a stock 2.5 TBI engine and expect it to last? Has anyone tried this ? This is on a 1989 Daytona 5 speed with 1993 engine. Conversion parts will be all Mopar from a 1990 Daytona turbo car. I know it can be done but will the motor last for any length of time?

[Rampage1967]

they put blowers on 2.2 na motors. Remeber, the engine is a high compression one & the pistons are fairly fragile, so, use an intercooler & good gas. in fact, i would advise a head shim if you do try this & keep the boost to stock levels.

BTW. I have never tried it, just going on info i have heard & my experience with a turbo slant six.

[allmotor]

give it a shot, if you don't try you really will never know if it does or does not work. be a leader and try, let us all know how things are going. I personally know the answer but my results may differ from yours (worked great for me)

[mpgmike]

According to Corky Bell, practically any engine can withstand 7 psi boost without reliability issues. Your tip-in throttle response will be what you have now, then it only gets better.

Mike

[john1320]

^He said "tip in", but forgot "big grin in" response, hehe!

[TurboTurismo]

Hmm was there a 2.2 turbo with sbec put on a 90's and up MoPar?...without the twin cam that is

[cky]

i had my car with a n/a 2.5 engine with all the turbo parts bolted onto it last year and it was great. but i then got greedy and kept turning the boost up. just run stock boost with stock timing and always fill it with 94 oct. it spooled up super fast and had tire melting low end. finally blew after 2 months of 20psi.

[Rampage1967]

I know the feelining, 12 psi 7 empty water injector tank combined withan incredibly pissed of driver killed that turbo slant six. It had no problem at 10 psi &treated sanely.

looking at yer experience, CKY & that one, I'd try it. My 2.2 K-car begs for it. :-)

[daytonajesse]

Quote:

Originally Posted by Robb Hmm was there a 2.2 turbo with sbec put on a 90's and up MoPar?...without the twin cam that is

There is lots of 8v 2.5's with the sbec 90+
The only 8v 2.2 I can think of is the vnt tona's/shadows

[DaytonaTurbo87]

Well the 86-88 2.2 T1's used the 659g leightweight rod, the same rod as the tbi 2.2's. The tbi rods in your 2.5 are of the same weight, but according to my book, a different part number, though the rods are probably the same, or pretty darn close. Pistons will hold up, but have a smaller dish, and therefore, higher compression. I'd recommend a head shim and I'd also throw on a G head, cuts off about .5:1 compression. The turbo G heads are getting kinda hard to find though, seeing as they were only made in 84 and 85. I've heard guys saying they were pushing 250hp with the LW rods, but if they fail you can only blame yourself, lol.

[turbulence]

Would running 2.5 electronics help by having a less aggressive spark curve? you'd need to decrease fuel pressure or run smaller injectors I would think?

Martin
89 Horizon

[DaytonaTurbo87]

Quote:

Originally Posted by turbulence Would running 2.5 electronics help by having a less aggressive spark curve? you'd need to decrease fuel pressure or run smaller injectors I would think? Martin 89 Horizon

Are you talking about running 2.5 electronics T1 with a turbo on a tbi 2.2 shortblock? If so, I wouldn't. I'd just run the 2.2 electronics but lower the base timing on the distributor rather than messing with fuel pressure.

[turbulence]

Quote:

Originally Posted by DaytonaTurbo87 Are you talking about running 2.5 electronics T1 with a turbo on a tbi 2.2 shortblock? If so, I wouldn't. I'd just run the 2.2 electronics but lower the base timing on the distributor rather than messing with fuel pressure.

Actually yes. Its hard to run 2.2 when the harness is 90 2.5 SBEC. Attempting to work with what I've got

Martin

[TurboShadowES]

there is a local guy running a 2.5 tbi bottom end in a 88 shelby Z with a turbo van computer and a T2 top end (dont ask.. I dont understand why either)

he likes it, its been that way for 2 or 3 years... But it isnt really that fast.

[DaytonaTurbo87]

turbulence, while it'll work, personally, I would pick up a 2.2 T2 sbec and run it. IMO might as well have what the factory intended for that application. The money and time you'd spend hooking up an adjustable fuel pressure regulator, fuel pressure gauge and whatever device you are using to determine what your fuel pressure should be you could just get a T2 computer, plus make a couple bucks selling your T1 computer. Then you'll also have optimal fuel and timing curves. The 2.5 computer w/ adjustable reg will be close, but IMO if you're gonna do it, might as well do it right. Just my $.02, good luck.