Building new longblock would like input.

[Ryan2112]

I am in the process of converting my 86 T1 Daytona to a T2 car. for now i am going to convert it to T2 and use the stock GLHS calibration. before i start bumping up the boost i wanna make sure my bottom end can handel it,
Here is what i have in mind: 89 common block, T1 crank, t2 rods, and t2 pistons. i was first conserned that i would need a t2 crank but after looking into it my t1 crank (probaly reground) will do just fine. for my top end i will use my 86 t1 head, possably a roller cam not yet sure. Also i was thinking of going with a 2.5 crank and pistons. what should i go for? what will the larger displacement do with my computer calibrations? any tips/input will go a long way. Thanks.

[Ryan2112]

i would also like to mention that i want to make this as budget as possable.

[ZoskalonMPI]

Do non CB cranks fit into CBs? If you're going to use stock TI pistons, your cap is 300HP. If you want to use 2.2L pistons, you need to use a crank from a 2.2L engine. Unless you're going with an all out 400HP+ race car, 2.5L is the way to go: 89+ block, plain ol 2.5L crank, TII rods, 2.5L TI pistons. Much better all around power with the 2.5L.

Where did you find a Daytona GLHS btw? Lol, what do you mean by stock GLHS calibration? Either way, you're having a 2.2L cal controlling a 2.5L engine and it supposedly makes a difference, just how big of a difference is beyond me but others on this board will tell you.

[Ryan2112]

[
Where did you find a Daytona GLHS btw? Lol, what do you mean by stock GLHS calibration? Either way, you're having a 2.2L cal controlling a 2.5L engine and it supposedly makes a difference, just how big of a difference is beyond me but others on this board will tell you.[/quote]

Its a TurboZ Daytona, i had to use a 86/87 GLHS logic module because the pinouts for the 87 turbo 2 Logic modules are diffrent. my stock 86 LM will not work with the t2 throttle body and only allowes 7.5 lbs boost.

[Ryan2112]

[quote=ZoskalonMPI;1348429]Do non CB cranks fit into CBs? If you're going to use stock TI pistons, your cap is 300HP. If you want to use 2.2L pistons, you need to use a crank from a 2.2L engine. Unless you're going with an all out 400HP+ race car, 2.5L is the way to go: 89+ block, plain ol 2.5L crank, TII rods, 2.5L TI pistons. Much better all around power with the 2.5L
QUOTE]

If you read it it says that i am using t2 pistons.

[ZoskalonMPI]

is your TI crank a 2.2 or 2.5

[Ryan2112]

Quote:

Originally Posted by ZoskalonMPI is your TI crank a 2.2 or 2.5

it is a 2.2 crank. but i have a 2.5 crank from a TBI car that i could use, so i can go either 2.2 or 2.5

[crusty shadow]

unless youre planning on pushing 450 hp or more a cast crank will be fine. stock TI or TII pistons with TII rods will hold up to about 325-350 hp if its tuned properly. non CB cranks will fit in a CB, you have to have the front seal journal turned down to the size of the CB

if you run a 2.2 cal on a 2.5 you will be running it lean the whole time. 2.2 cal gives less fuel than a 2.5 cal and bumping up fuel pressure wont work. use the proper cal for the engine.

[macncheese]

I ran a 2.5 on a 2.2 calibration for a while in my charger. It can be done on stock fuel pressure if you get +20 injectors. It'll run ever so slightly rich, but the 2.2 cal also has a more aggressive spark curve. I pulled the ignition timing back to 8* advance instead of the stock 12*, and was pleased. Idle quality suffers slightly, and so does performance at part throttle boost levels, but my non-car-oriented friends didn't notice. I ended up putting in a two stage boost controller so that I would only get 5psi at part throttle and full boost only at WOT and that solved my griping, especially since I built it out of junk solenoids. There are pictures floating around here somewhere. I definately recommend getting a custom cal, but it's doable the other way.

Tony

[jim34]

t2 pistons wont work on a 2.5 you have to have 2.5 t1 pistons, they're just as strong as the t2 pistons anyway so no worries there