2.5 on 2.2 Electronics

Im going to replace the 2.2 in my CSX-T with a 2.5,and my 2.2 has a charge temp sensor in the intake.The 2.5 doesn't have the charge temp sensor and I want to use my intake.Can I use my 2.2 electronics with a set of +20's and adj FPR? Is the 89 SMEC wired for an air charge temp sensor internally? I'd like to run the 2.5 electronics on the 2.5 motor.I know some of you guys out there know what to do.

[turboshad]

No one seems to be answering so I'll try to give some of my limited knowledge. I have never done a swap like this so all info is just from my bad memory of what I have read. (Howse that for a confidence booster?)

Anyway, as far as I know if you use +20s with the 2.2 electronics on a 2.5, it will bring the fuel supply up just above a stock 2.5 with 2.5 electronics. From what I understand it isn't too high and it will give you a little more room for increasing your boost. If you want to use the 2.5 electronics they won't have an input for a charge temp sensor but this won't make much difference unless you are intercooling it (which is always a good idea) b/c the 2.5 SMEC are calibrated for a non intercooled engine. Another option is to get a custom cal for an 89 SMEC for +20s or better yet +40s with a 3bar map sensor and get them to include the charge temp sensor in the cal. Then you would be able to use it. But even if you don't it won't hurt anything to have it in your manifold while it isn't hooked up.

If this makes any sense then I hope it helps. Some one please correct me if my info is wrong.

DJ

I was starting to worry about this post a few minutes ago.Thanks for kinda helping me.I've seen on Gary's site that I can run the 2.5 on 2.2 electronics but didnt say what exactly to do when doing it.Guess we'll swap the motor's see what happens.

[Bad Vibe]

That is the set up I am running, the 2.5L with 2.2L computer. Had to upgrade the injectors on mine, just as Gary said to on his web site. I also added a air/fuel ration guage and an egt guage, Gary recomended as a good idea. I had to also change my fuel reg to an adjustable and back down the fuel pressure to about 50lbs. The fuel pressure was set with no vac line on the regulator, Gary also said to do. I have been putting together another project, so I have not gotten mine done yet. I hate being side tracked and not having the daytona to run around in. I am running stock boost, that is the only reason I had to back down my fuel pressure. I think Gary said, that with pressure at stock, I could have run about 17-19lbs. of boost. If you do not have a air/fuel ratio guage and a egt guage, it is a g*** idea to get them. Hope this helps some.

[glhsken]

I'm Running an 87 car with a 2.5L on 2.2 electronics.. Using +20's and setting the base timing at 10 until I can check it all out

[Garret]

wouldn't the spark advance from the 2.2 electronics cause massive detonation on a 2.5???

[dabraun]

I had massive knock when running a 2.5 on 2.2 T1 electronics. I only found out using an OTC engine scanner. This was with +40's and low boost. I had good O2 readings and low boost but still lots of knock retard. I'd strongly recommend swapping in a 2.5 computer or getting a custom cal.

[glhsken]

Quote:

Originally posted by dabraun I had massive knock when running a 2.5 on 2.2 T1 electronics. I only found out using an OTC engine scanner. This was with +40's and low boost. I had good O2 readings and low boost but still lots of knock retard. I'd strongly recommend swapping in a 2.5 computer or getting a custom cal.

I've personally worked on and tuned a 2.5 on GLHS stage II electronics that ran 12.1 @b 116.5. It's like everything else.. take your time... Tune it slow. (But I do have a lead on custom electronics to run the 2.5 with +20's, you are correct it is the Best way to go)

[macncheese]

hey ken,
i just put a 2.5 in my charger with a socketed LM. any particular problems you are aware of that might help me out? anything you learned the hard way and can show me the light? i get a popping in the intake that i thought was cam timing, but somebody suggested might be detonation. after messing with the cam timing back and forth i'm lost. any words?
thanks
tony

[glhsken]

Tony, What is your fuel set-up and which LM. What is the base timing set at???

[BadFastGTC]

Quote:

Originally posted by Robert McFee Im going to replace the 2.2 in my CSX-T with a 2.5,and my 2.2 has a charge temp sensor in the intake.The 2.5 doesn't have the charge temp sensor and I want to use my intake.Can I use my 2.2 electronics with a set of +20's and adj FPR? Is the 89 SMEC wired for an air charge temp sensor internally? I'd like to run the 2.5 electronics on the 2.5 motor.I know some of you guys out there know what to do.

I've been running my tan GTC on 2.2 electronics and the +20's for almost 100K. I put a Spearco in the car and a T-1 radiator. I run base fuel pressure at 55 psi. I've set my timing at 4 degrees and the car runs great. I did run into a lot more detonation with more timing in the car and I get a little off throttle ping at times. I did have +40's in the car and it ran very well at 50psi fuel pressure, albeit on the rich side. Highway cruising was fine with the +40's, but the around town drivability suffered and fuel mileage sucked. I can pull down 30MPG while cruising at 75 with the +20's. I've been running the car with the boost set at 20. I'm running my stock T2 turbo on the car and spoolup is fantastic. I had tried to run the car on a dyno, but the lower intercooler hose blew and the power obviously fell right off. Prior to the hose blowing the car was at 192WHP and 318Ft.Lb. at 2800RPM. When I complete the cylinder head and intake I have planned for the car, I'll get it back to the dyno and see what it pumps out then. The 2.5 is killer up the mountains in your area too. No downshifting required.

I hope to be acquiring a 3bar/+40's cal for the 2.5 soon. I need to have the cruise control and A/C. Driving 70K miles a year will make you long for these features.

[glhsken]

Quote:

Originally posted by BadFastGTC I run base fuel pressure at 55 psi. I've set my timing at 4 degrees and the car runs great. I did run into a lot more detonation with more timing in the car and I get a little off throttle ping at times.

Thanks bud.. Just the info I was looking for... I'll back the base down further.

[Pat]

In this guys case, an '88 CSX-T, he can just pick up an '89 2.5 T-I SMEC, plug it into the '88 SMEC harness and he'll be just fine. The CTS will not be used, but so what...just leave it plugged in at the intake and it will look and run just fine.

Pat

[macncheese]

ken,
i've got +20s and the regulator and rail from the 89 lebaron i got the motor from. i also set the timing at 12*, but it looks like i might try a lot less after reading that 4* up there!!! as far as that popping goes, looks like the machinist took enough metal off the head and block to warrant an adjustable cam sprocket. somebody said .033 is 2 or 3 degrees, and i think each tooth is only nine?
thanks.
tony

[glhsken]

HE MILLED .033.... WOW.. THAT'S A TON... back the compression off. Yes.. each .010 is roughly a degree.