88 TC engine w/ 1991 DP head = what compression ratio?


Sevensecondsuv

15+ Year Member

Boosted (Not Stock)
Joined
Aug 7, 2007
Messages
1,140
Points
3,101
City
Northern IL
Vehicle Year
Many
Transmission
Manual
So I've realized that I can buy a complete (engine, turbo, computer, wiring, etc) '88 turbocoupe engine for what the roller cam for my NA project costs.

I just finished P&P'ing a 1991 dual plug ranger head. It will also have big valves installed.

I'm thinking of buying the TC setup and doing the swap into my ranger using the ported 91 DP head and obviously swapping over to DIS using the parts from my current engine. Of course I'll disasemble, clean, re-ring, and replace any other needed parts on the TC block. Anyone got a write up how to do a DIS swap on a turbo motor?

Question is, what will be the resulting compression ratio if I put the ranger head on the TC block? Will I still be able to run full boost without detonation? Will this mess up the LA3? I do plan on upgrading the intercooler while I'm at it.

Oh and anyone want to make a guess at how much HP this combo will make? I took alot of metal out of that head.
 
Last edited:
So I've realized that I can buy a complete (engine, turbo, computer, wiring, etc) '88 turbocoupe engine for what the roller cam for my NA project costs.
The price of roller cams is just plain stupid. The blank is only slightly more expensive to make, the cost of grinding is the same.

Anyone got a write up how to do a DIS swap on a turbo motor?
It's not difficult. I don't think I have ever seen a complete write up, only wiring diagrams. I'll try to find those for you later this week end. It basically consisits of mounting the crank trigger, finding a spot to mount the DIS module, preferably on a big heat sink, and wiring it up.

Question is, what will be the resulting compression ratio if I put the ranger head on the TC block?
The earlier dual plug heads had larger chambers than the later ones, you'll probably end up in the mid to high 8's.

Will I still be able to run full boost without detonation?
Shouldn't be a problem.

Will this mess up the LA3?
No, it doesn't care.

I do plan on upgrading the intercooler while I'm at it.
Upgrading the stock one or installing a front mount?
 
Putting a larger intercooler in front of my radiator, behind the grille. How do the ebay specials work?
 

Sponsored Ad

TRS Events & Gatherings

Featured Rangers

Want to see your truck here? Share your photos and details in the forum.

TRS Latest Video

Official TRS Merchandise

Follow TRS On Instagram


Product Suggestions

Back
Top