i have a chance at getting a LT1 caprice engine for cheap can i use this engine for my 1989 GTA and throw the TPI on it? if so how much hp would i be loking at stock is 260hp and 330tq i know that but how much wih tpi? and maybe a nicecam.also i have 1 5/8" headers wil they bolt onto the LT1?

 

Why not keep it as an LT1?

 

its currently a 350 TPI i want to use a LT1 caprice engine to replace m engine but i want to keep my tuned port system.can it be done? and how much hp gain?is the ?

 

You would be restricting the engine by putting such a **** poor intake manifold on top of it.

 

Is the Caprice engine an LT1 or TBI? Can't be both.

If LT1, TPI would be a performance loss.

If TBI, TPI would be a very small gain, if any. The heads are the limiting factor.

 

it has to be better than the TBI unit tha it had on it

 

the lt1 is a tbi unit i was thnking o going with a bigger cam maybe hot cam and i have alot of modsdone to my car allready

 

It's either LT1 or TBI. It can't be both.

TPI is built for low-RPM torque. The TBI can manage decent HP, and isn't as RPM-limited.

If it is TBI, it will have the very poor swirl-port heads. Until they're gone, you can't expect much from it.

 

wellit would be better than my stock L98 is now right? plus my L98 has a slight noise in the engine.

 

If it is LT1, it would be better if you keep it LT1. TPI on an LT1 engine is just silliness.

If it is TBI, you're better off with your L98.

 

can i use the tbi LT1 block and just put my tpi on it and ru the engine like that? my car is tpi te lt1 is a TBI i just want to use the long block can i use the long block?

so your telling me that my engine makes225hp and 300lbs tq with the tpi. and the LT1 TBI makes 260hp and 330 lbs tq that my tpi on top of that engine wouldnt make the same or more hp than the LT1 i find that hard to believe im sorry it just doesnt make sense.

 

What you're saying doesn't make much sense.

LT1 is a Gen II performance engine put in Impala SS's and some police Caprices. It has some unique features such as port injection, reverse flowing coolant (goes through the heads first instead of the block first), and the ignition control is mounted on the front of the engine running off the cam. LT1's were also put in 4th gen f-bodies and Vettes, but with aluminum rather than iron heads (among other things).

TBI 350s are the more standard Gen I SBC, aka LO5. It is the run-of-the-mill 350 put in full size passenger cars and light trucks. It looks a lot like a carb'd SBC. It also has very poor flowing heads that are pretty much maxed out by the factory. Since it is the heads that make it poor (along with the cam), putting a TPI on such a long block will result in a reduction in power over an L98.

Do I have to say it one more time? There's no such thing as an LT1 TBI engine. If you say that one more time, it may set off a

 

their is no such thing a s a LT1 tbi engine ok i guess imcomfused then its a 1994 caprice x trooper car 9c1 what engine is that? and what intake does it have? because i drove a 1994 cab that had a tbi 350 and it screemed it had a tone of torque and it was faster then m GTA tuned port. i thought that it was a LT1?

 

I suggest you read this https://www.thirdgen.org/techbb2/sho...hreadid=269549

It took me all of 2 minutes to find it searching the Engine Swap forum for 9c1 - on dial-up.

 

If its got a tbi on top, its NOT an LT1, if its a 94 or newer caprice / impala, it *should* have an LT1.

 

ok i called the guy and he ses its a LT1 and he has a spare LT1 engine with harness and computer so i guess im gonna look into the conversion thanks for the help guys.

 

It definately wouldnt make as much, because TPI is a POS intake system.

 

Any 94-96 caprice, police package or not could have the LT1. If not it has the L99 265ci gen 2 block. I know all about caprices, my beater is a '91 L03. The TBI 350 (L05) came as a higher performance option on 91-93 caprices. The Police package L05 in those years had a bigger cam and more power. If it really is an LT1, or even if you're getting sold an L99 and being ripped off: keep the LT1 intake and ECM, or else you'll make a lot less power.

 

Does any use the b-body lt1's in their swaps? are there any differances in the engine besides the head material? if so what years should I get?

 

The b-body has a milder cam and iron heads. It's a perfectly good engine, especially if you're gonna upgrade the cam anyways. I beleive the 94's have hardened pushrods, but the 95-96 doesn't. As with all LT1 engines, opti was upgraded in '95 and OBD 2 is on '96's, so it's really up to you what you want. This link should have all the answers you need:

http://www.impalassforum.com

 

thanks guys it does have a LT1 and a spare LT1 im gonna trade it for my 95 honda civic ex.anyone have a idea what it will cost me to put the LT1 in my trans am? of course i wil change to the hot cam when i do it.

 

I'd set aside $3000 at the minimum. may cost you more, may cost you less, just depends on a lot of things.


my bad, missed where you were trading your car for it. In that case, probably $500-$1000.

 

At bare minimum, under $500, thats if you arent modding it any and dont do a/c.

 

well im going to look at the caprice and the engine tommorow wish me luck if i get it i will start the transplant in the spring wish me luck on that also. thanks alot for all your help its great to have a supporting cast like thirdgen and friends thanks again people.

 

There are better cams than that, especially for an LT1. I hear people get good results with the CC503 in that engine.

 

It depends on what he wants. Hotcam is good for a mild cam and will give you great seat-of-the-pants pull. If you want a pretty stout cam though, get the CC306 as its called. You'll have to change valve springs and get some roller rockers for it, as well as hardened pushrods, but it will be worth it.

 

well loks like the guy is changing his mind he want to trade rjuts cars he wont give up the engine he ses now that he rebuilt it and he wants 700.00 for it so i dont think im gonna trade for the caprice not sure yet.do you guys think its worth my 95 honda ex for his 94 caprice its a clean looking car but the front lights wouldnt work when i got teir he ses hes goin to fix the lights give and put snow tires on it and give me xtra suff like a newexhaust,radiator,fans,overflow tank etc.i wouldnt mind selling the putting a supercharger on that caprice be a nasty grocery getter lol.

 

I wouldn't sell your Honda for the Caprice. Looks like the guy already changed his mind from what he told you to begin. Plus the Honda is a good car. I bought a CRX just to have while I did my LT1 swap. One of the best decisions I have made. 40mpg, small and nimble, and believe it or not, fun to drive.

Keep the Honda and look for a motor or motor/engine combo.

 

well the reasn i want the caprice is the honda is to small i have 3 kids 8,3,2 so i need a bigger car.its a nice caprice thoug its in good shape and its the caprice calssic with the carpet and loaded.

 

Caprices are great cars, I won't stand for any caprice bashing.

 

Well, I didn't know you were in need of a bigger car than the Honda. I still wouldn't get it Our tastes are different apparently. I think they are ugly. I would much rather have an Impala.

If you want it, go for it.