Head swap question
- Thread starter fl89tta
- Start date
72firebird
Active Member
- Joined
- May 18, 2004
Well you can use any GN heads if you take out your AC or just get some 3.1 FWD Buick heads and have them ported and I believe those will fit the same as stock.
fl89tta said:
Yup the 3.0 heads off the Delta 88, Lesabre's, etc on mid 80's FWD Buicks/Olds cars. The valve covers will look like the TTA's.
Look for casting numbers ending with 7515. You can open the oil fill cap and look inside the head and see the numbers.
There was another I had seen used.. casting 2428.
HTH
trading t/a
I'm Angry!!!!!
- Joined
- Aug 6, 2001
Aren't the GN valve covers perimiter bolt? If so there's your answer. As far as looking at them the GN heads are wider than the TTA heads...
More Questions.
I'll still be able to use the block, even if its a GN block? Im panning on just getting my original heads redone, and put em on new motor. To use the GN heads in my TTA does just the A/C compressor need to go? Or what else would need to be removed?
I'll still be able to use the block, even if its a GN block? Im panning on just getting my original heads redone, and put em on new motor. To use the GN heads in my TTA does just the A/C compressor need to go? Or what else would need to be removed?
83ttypecooled
Active Member
- Joined
- Sep 14, 2003
Hi,
Get the right part! Take the motor back and tell them it isn't correct. Why should you have to swap heads and everything else? Unless they gave it to you, why mess around?
Get the right part! Take the motor back and tell them it isn't correct. Why should you have to swap heads and everything else? Unless they gave it to you, why mess around?
Yes the FWD heads will work with the AC and everything else. They are nearly identicle with no noticable differences other than casting numbers.fl89tta said:
Now the downfall is that you will end up raising your compression to 9.27:1 with GN pistons and TTA heads. Assuming the engine you are buying has turbo pistons and crank, it shouldn't be too much of a problem and you will just have to run a little less timing or boost but get better response out of boost.
The 6293 heads are the older 3.8 heads. Pre GN. The water ports are a little different than a GNs, but otherwise, they are the same. If you take a motor that was built for those heads, and put on the TTA heads, you are going to have too high a of a compression ratio.
What will Happen?
Will I keep blowing head gaskets? I guess I'm really screwed. My TTA heads were sent out today to get redone, they are going on the other motor. How do I know if the motor's a pre GN motor? If it's not will I still have the same problem(too much compression)? I grew up around big blocks and natural aspirated motors, Isnt higher compression good?
I really really appreciate the feedback from all yous.
Thank You.
Will I keep blowing head gaskets? I guess I'm really screwed. My TTA heads were sent out today to get redone, they are going on the other motor. How do I know if the motor's a pre GN motor? If it's not will I still have the same problem(too much compression)? I grew up around big blocks and natural aspirated motors, Isnt higher compression good?
I really really appreciate the feedback from all yous.
Thank You.
This thread is far out on left field.
First it sounds to me like its the wrong motor. May even be the wrong block, wrong crank, wrong pistons, wrong cam, etc.
Your gonna blow head gaskets if you detonate the motor. Having higher compression makes this easier to do.
You better research the block casting numbers, crank casting and assure its a rolled filet crank, and then go and see what pistons are installed into this mystery motor. Rods will have two dimples on them IF they are turbo rods. If you fail to heed these warnings.. eminent problems are guaranteed to happen.
TTA pistons are available from Johns performance. Not to say what was wrong with the original motor that you need to replace the entire motor?
Quit making decisions without having proper facts and documentation. So far the wrong motor was ordered, and the fix is to RIG the heads onto it.
The terms "rolled filet, turbo crank, turbo rods, 109, 229, 877, etc" are searchable on this board to educate. Hope you start digging now befire its too late.
FWIW, nobody sells a rebuilt TTA motor. The fix is rebuild your own. If you want things correct.
Lastly that motor they sold ya, does it even have a hole for the turbo drain on it
First it sounds to me like its the wrong motor. May even be the wrong block, wrong crank, wrong pistons, wrong cam, etc.
Your gonna blow head gaskets if you detonate the motor. Having higher compression makes this easier to do.
You better research the block casting numbers, crank casting and assure its a rolled filet crank, and then go and see what pistons are installed into this mystery motor. Rods will have two dimples on them IF they are turbo rods. If you fail to heed these warnings.. eminent problems are guaranteed to happen.
TTA pistons are available from Johns performance. Not to say what was wrong with the original motor that you need to replace the entire motor?
Quit making decisions without having proper facts and documentation. So far the wrong motor was ordered, and the fix is to RIG the heads onto it.
The terms "rolled filet, turbo crank, turbo rods, 109, 229, 877, etc" are searchable on this board to educate. Hope you start digging now befire its too late.
FWIW, nobody sells a rebuilt TTA motor. The fix is rebuild your own. If you want things correct.
Lastly that motor they sold ya, does it even have a hole for the turbo drain on it
My motor...
The original motor spun the timing chain, bent a few pushrods, nicked a few pistons, and needs plenty of work, The water passages are all clogged. I'm going to completely go thru original motor, but its gonna take me some time, I need the car mobile, cuz right now its sitting outside(yuk). And I want to get it running so i can garage it. I'd like to rebuild the original motor. I got the new motor cuz its the only thing I could find anywhere. It is a turbo block(has the oil drain hole). Where would the engine casting numbers be found? I want to have a spare motor to play with. Rebuild the original motor, and use the other for racing, I've been reading this board awhile, I'm trying to learn all I can about the TTA. I really do appreciate all the help everyone here has given me. So, my problem now is What do I do now? Thank you.
The original motor spun the timing chain, bent a few pushrods, nicked a few pistons, and needs plenty of work, The water passages are all clogged. I'm going to completely go thru original motor, but its gonna take me some time, I need the car mobile, cuz right now its sitting outside(yuk). And I want to get it running so i can garage it. I'd like to rebuild the original motor. I got the new motor cuz its the only thing I could find anywhere. It is a turbo block(has the oil drain hole). Where would the engine casting numbers be found? I want to have a spare motor to play with. Rebuild the original motor, and use the other for racing, I've been reading this board awhile, I'm trying to learn all I can about the TTA. I really do appreciate all the help everyone here has given me. So, my problem now is What do I do now? Thank you.
trophystock
Member
- Joined
- Sep 17, 2003
Not to hyjack the thread but has anybody looked into using some later 3800 series II heads?
Just put in GN Motor??
If I put the GN motor in my TTA does just the compressor have to go? or what else would have to be done? I'm thinking put the GN motor in TTA deal with loss of A/C. Rebuild original motor then reswap. Just need to know what needs to go to accomadate the GN Motor? Thanks.
If I put the GN motor in my TTA does just the compressor have to go? or what else would have to be done? I'm thinking put the GN motor in TTA deal with loss of A/C. Rebuild original motor then reswap. Just need to know what needs to go to accomadate the GN Motor? Thanks.
