DFASTEST951

That's what I would do if I did it. Turbo it. The 951 chassis can't handle that?

DVC

Tony-

I have a feeling he didn't take you up on your offer to drive the 951 V8....

FRporscheman

Why not just blow a 928? Sure you'll have to spend time fixing it but you'll have to spend time converting a 951 anyway. Might as well have a car that is 100% Porsche and has looks to match the v8 roar. Those volvo taillights just don't go with the v8 sound. And don't tell me the 951 handles better - I know that. The 928 handles well enough for a street-driven hotrod. If you drive on the track you would be worrying about the suspension more than the engine anyway. That's my perspective anyway, take it for what it's worth.

Please keep in mind I personally despise and loathe 928s; I'm not advocating them.

porshhhh951

928 modded motors aren't cheep and easy to work on. I also don't know of any 450rwhp 928 motors. Not that it matters.

The money can't be argued 6k for a ls2 with everything is stupid cheep. You could blow it, turbo it, shoot it up, or just keep it n/a. Either way its a hellva reliable/cheep powerplant.

BlacknRedGT

what are the problems with fitting a LS2 in the engine bay compared to just dropping a LS1 in?? Just modification to cross member and bell housing like the LS1 or are there other things that need to be done aside from that and the regular stuff (suspension, wiring, etc)

333pg333

So with the 500whp+ what transmission are you going to use? Are you factoring in changes to this, axles, CV's, torque tubes, bell housings etc...There's enough doubt of the stock tranny to handle your desired power levels.

porshhhh951

new bellhousing adapter, zo6 clutch aparently. My cv's are still reality new, my tranny isint stock its got hardned syncro's, upgraded turbo S 1st and 2nd gears. Tq tube I know he does something but, I have no idea. Oh and my axle's were swapped out awhile ago. I forgot what my porsche guy orderd. He put them on after I poped my cv launching. I know they are stronger than stock but, I dont know how much stronger.

Really all thats a moot point though isint it. You are always gonna break some stuff if you drive your cars hard. Which I always do. Im not that worried about it I hear our 951 tranny's are pretty strong and launching is what really hurts your car. I'd only be doing that a few times at the drag strip and even then i'll prolly go easy on it.

After all I don't care about ET's one bit. Its trap speed i'd be after.

DVC

A few things. The Deuce is fly-by-wire, so we converted mine to cable throttle with a FAST 90mm, and changed some sensors:



The LS1 has its fuel pressure regulator integrated into the fuel rail. The LS2 does not. So we used an Aeromotive adjustable FPR (also for when I cam it). Note the stealthy location:

BlacknRedGT

very nice...

BC

The 928 can be made light, but not as light as a 944 body. And you guys have more readily available body kits to allow for wider tires. But it would technically be able to handle more power. Maybe not the trans, but that's being worked on. Maybe 500tq but just don't do the apex curbs too hard.

If you boost the 5L, you can get 525-550 (at the wheels) with some custom chips and whatever boost you need for that, usually under 12. Its proven pretty reliable. Call it about 8k for everything, plus the car, on an S4 platform so you can actually stop with the bigger brakes. You can also spend more than 13k or closer to 16 on a stroker motor. Sleeve the engine. 4V head work, and there are two 7L already running. Many more 6.5L. But without building it yourself its more like 20k for the engine.

A couple people have done the Chev stuff in the 928. It makes it lighter, and handle better, funny enough, because the Chevy engines are lighter, and are shorter, and not as long. LOL ( I guess that statement was subjective, but the dimensions and resultant movement of the engine mass DOWN and BACK can't be ignored. I was just weighing out an LSX long block, and I think the iron block, al heads dressed LSX may be lighter than the dressed S4 engine, or at least not heavier.

But our 4V heads are a work of art, and very robust, so its difficult to just ditch the motor. The bottom end just has huge oiling issues, windage and delivery. Unthinkable in today's performance engines. Like Oil returns from the heads pointed at the crank. Stupid stuff like that, which is second nature to not do in new modern engines.

I have spent another 2000 or so on things done to my stock long block 5L so it will hold together past 700 crank. But its an open deck engine, so I need to be careful no matter what I do. I will be using E85 to get that far, and have started to build the fuel system around that fuel.

The Despise and Loath comment was weird though.

333pg333

"The Despise and Loath comment was weird though."
That's just the latest book from Hunter S.
Seriously, I like seeing the 928's roaring around the track and I'd love to have a go of a well sorted one.
I still think the transmission/CV's/axles etc is going to be a bigger sticking point for all these 500+ hp cars despite what engine they have.

BC

I guess that could be true on the CV axles, but mine are like 30 pounds. Weight doesn't always equal strength, but they sure as hell seem robust. And heat is a killer on the boxes, so I plan on a cooler.

DFASTEST951

I don't know. If I were going to put a 928 motor in a 951, it better be putting out 800+ hp. My little four banger is over 500 now and it needs upgrades! There are C5 vette motors puttion out 1100 +hp right now. The latest just broke the world speed record for the fastest production car (sscautos.com)
It just pisses me off that it's so hard to squeeze power out of our cars, whether they are four banger, or V8s.

333pg333

Ah Joe I think for a 928 motor to hit 800hp it will need that many k'$ spent on it. lol. Twin turbos, dry sumped, re-engineered and rebuilt everything. Be nice to keep it in the family though.

DVC

I understand the desire to keep it all Porsche. I use to as well. After you've done a few builds (and you get older ha!) I think you become less concerned over the whole "purity" idea and more concerned with performance, reliability, and value. And its eerie how well these LS motors fit and run in the 944. Almost as if Weissach may have had a hand in them.......