Engine Swap question - Pontiac Solstice Forum
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post #1 of 10 (permalink) Old 07-17-2019, 02:55 PM Thread Starter
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Engine Swap question

So, I've been reading about those who invested significant coin into their Solstice and performed swaps, the LS3 being the most common that I've seen, but I wanted to ask if anyone has considered swapping out the 2.4 for a Pontiac 326 or other small block V8?

One day I'd love to swap it out, but I would like to swap in a Pontiac. Thoughts?
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post #2 of 10 (permalink) Old 07-17-2019, 04:50 PM
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the ls is so far superior than any of the other gm engines and in every junk yard too.along with lotsa people putting them in to everything. I have a old all aluminum 215 cid v8 all in peices.Ive had it for probably 30 years. if I had a car that needed a motor swap...I would have to do some hard thinking. ( buick, olds 215 from the 60's, now days it's in the british laylend stuff.) I doubt Ill ever do squat with it.probably cant find all the parts....but the main parts are there and usable if needed.gm also used it with turbo or blower. lots of guys like them in sand cars due to the light weight, but now days...there is the LS.
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post #3 of 10 (permalink) Old 07-17-2019, 05:18 PM
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Quote:
Originally Posted by Scott94 View Post
So, I've been reading about those who invested significant coin into their Solstice and performed swaps, the LS3 being the most common that I've seen, but I wanted to ask if anyone has considered swapping out the 2.4 for a Pontiac 326 or other small block V8?

One day I'd love to swap it out, but I would like to swap in a Pontiac. Thoughts?
Late model engines a very popular with everything because the have all the latest tech. FI and so much more. Old school carbs are very fun in the right cars like 45 yrs and older I have one. They stink emmission wise they kick out all kinds of smells out the pipe even the engine bay. Nice on a part time bases. I like the idea all Pontiac, Pontiac dosnt have a big block 326 or 455 is the same. Good at the time but hurts them in stock appearing drags against other mfgs. now. As Pontiac already bored and stroked them about as far as they can go back then.

Only thing I considered Solstice is a nice looking 4 cylinder sports car. Convertible a plus. It is what it is.
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post #4 of 10 (permalink) Old 07-17-2019, 08:54 PM
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The GTO and other Pontiacs came with LS motors. It's a GM motor but has been put into almost every make of GM cars
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post #5 of 10 (permalink) Old 07-18-2019, 03:28 PM
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Late model engines a very popular with everything because the have all the latest tech. FI and so much more. Old school carbs are very fun in the right cars like 45 yrs and older I have one. They stink emmission wise they kick out all kinds of smells out the pipe even the engine bay. Nice on a part time bases. I like the idea all Pontiac, Pontiac dosnt have a big block 326 or 455 is the same. Good at the time but hurts them in stock appearing drags against other mfgs. now. As Pontiac already bored and stroked them about as far as they can go back then.

Only thing I considered Solstice is a nice looking 4 cylinder sports car. Convertible a plus. It is what it is.
yes pontyack does have different blocks!!!sorta , but the heads do interchange unlike most other big or small blocks, then there is the big chief engine witch is based off the big block chevy with rolled valve angles and much better port lay out. back years ago the mopar race team ran the big chief engine in a dodge with modifyed valve covers to look like a mopar engine... and they were winning races so...all the gm racers protested and they had to develop thier own engine....but many of the gm teams were chevy, and the big chief was pontaic...so it was a one sided you cant but I can kind of thing.
the 301 pontaic in both turbo and na was a smaller engine and a pos. the crank shaft looked like a twisted peice of rebar with 2 counter weights....garbage. and the cylinder heads had 2 intake ports....1 big and 1 small port....I used to do a lot on the pontaic cylinder heads for racing,I'v got over a hundrad hours of flowbench time with them.in general the big valve heads were **** the small valve heads were the way to go and put big valves in them and the proper port/chamber work. nowdays...there is the edelbrock aluminum great flowing heads for them and much lighter too!!! also pontaic used the oldsmobile 403 engine in some of thier cars...witch was a sorta small block since the olds 455 was wider. and a good 455 olds in a firebird could pull the front wheels with the right rear tires...dont that too.
IMHO a 326 in a solstice is a move in the rong direction....lotsa weight, no real performance parts and heavy too.along with the added weight.did I forget to say they are heavy? a 400 or 428 with aluminum heads& efi might be neet.and a tight fit too.and dont ferget the trans...
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post #6 of 10 (permalink) Old 07-19-2019, 10:42 AM Thread Starter
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Thanks, that makes sense.
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post #7 of 10 (permalink) Old 07-20-2019, 11:54 AM
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Crazy to even consider putting anything but a modern tech engine into a Kappa, IMHO.

Given that, the LS series is perhaps the best engine GM has ever come up with, if I were to ever contemplate such a swap I'd opt for e Gen III or Gen IV LS over anything else. But you have to consider the alternative - easy to rework the LNF into the 400-500bhp range, so unless you are a V8 hard case, that would be an interesting alternative.

BTW, unless you hotrod the 326, it has less power and torque than a stock GXP (remember that the pre 1972 figures were gross and ours are net).

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post #8 of 10 (permalink) Old 07-20-2019, 12:28 PM
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I would love to see a 3.5L twin turbo ecotech from Ford. Considering, when tuned properly, they can push 600+hp. Or even the new 2.7L. I've seen a Mustang pushing over 450hp with that one!

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post #9 of 10 (permalink) Old 07-20-2019, 02:18 PM
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But you have to consider the alternative - easy to rework the LNF into the 400-500bhp range, so unless you are a V8 hard case, that would be an interesting alternative..
As soon as you feel like stepping out of the kiddy pool (400-500bhp) and playing with the big boys (700-800bhp) the LNF makes no sense whatsoever. Don't get me wrong, beating up V8 cars with a high HP 4 cylinder is a lot of fun but my budget couldn't keep up. "No replacement for displacement" is a cliché cause its true.

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post #10 of 10 (permalink) Old 07-21-2019, 12:19 PM
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(remember that the pre 1972 figures were gross and ours are net).

Technically yes, still Net Hp per SAE NET standard

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