hummmm 20b in a vette!!! oh god that would be awesome

 

I disagree with it being cheaper to mod a seven to single status reliability. Plus, there is a *reason* people would rather mod the seven with the LS1: weight. The corvette isn't light like that Plus, its way cheaper to get the LS1 in the FD then buy a C5.

Let's assume a few things first, most of the people that are looking at these options and the majority of owners are on an engine that has a limited life left. Also the turbos are stock in that case usuall. Or, that person has alot in mods that could be sold off, which a whole other cool issue.

The Single "costs" from a stock car at 60k miles:

2600 Rebuild
2600 Basic single kit
600 Injectors, fuel pump
1100 PowerFC
300 Datalogit
500 Wideband O2
1000 Intercooler, something used/basic
350 Decent radiator
300 Boost controller

That $9,350.00 Notice I didn't include items like the clutch, which very expensive for the FD and cheap for the T56; and exhaust, as it would be needed with either. Also notice I have made the prices on the low end, to account for using some used performance parts.

For the V8:

4000 High priced LS1/T56, lowest around 3k or so.
1300 Engine subframe mods, bumbsteer correction, driveshaft, tranny brace, torque arm.
425 Wiring mods to the LS1 harness if you don't want to do it yourself, including the A/C
80 Speedo correction
172 Clutch hydraulic mods for T56/FD
645 Cooling, huge radiator, all hoses, clamps, etc.
400 Fuel mods, pump, regulator, etc.
1000 Exhaust fabrication

That's 8022.00....
Add another $500 or so for misc stuff...but its pretty well covered above.

$8522.00 assuming you can do the basics, this is with nearly no fabrication yourself 'ordering' stuff from vendors.

You mentioned that 'if you do it yourself'.... that the V8 would be well over 10k. What would the seven's figure grow to if you had all of it done for you to get that power?

I just wanted to make sure these figures were out there, its no where near how much people think it is in expenses.

The really cool part is when you talk about talking a seven and selling the motor, tranny, etc; to pay for the V8. We all know how much those parts are worth I estimate I can get 3k or MORE out of the car's parts when swapping to a V8. Could make that 8k+ figure more like $6,000.00, on the high end to get a running V8 in the FD! Seriously. Take that 2k you saved and get a cam, intake, some hahahaah.... valvework; and headers....you get the idea.

Who knows what an LS1 with intake, cam, light headwork, and headers produces at the wheels? How about once you add LS1Edit? Now you see why people are so seriously considering this.

 

how bout the ligenfelter z06 TT ls1 in an fd??? thats what 800rwhp? hmmm... prolly is im possible, but sure does sound fun

 

Would someone PLEASE show me a dyno jet graph of a LS1 with a significantly larger power curve than my 13b with upgraded twins?

My chart can be found here.....
http://66.216.67.51/images/products/dynos/dynograph.jpg

*** Also, note I said POWER curve not TQ curve....the hp is the line to pay attention to if you want a fast car***

STEPHEN

 

i would defintly say single, just love the sound and the way rx7's look

 

Let me start by saying nice graph. it's impressive and I'm sure you're car is a blast to drive.

I don't know about significantly larger, but take a look at this link from thunderracing:

http://www.thunderracing.com/index.c...t&contentid=53

They make similar top end power, but make 200 HP by 3K RPM, yours is around 3700-3800. At 3700 RPM the ls1 is making 250ish. Both make 400HP around 6K RPM.

I think the basic advantage there (which is obvious), is the low end power. Assuming the cars are similarly weighted and the gearing is the same (which with the T56 it's not exactly the same, but the rear is still 4.1), what part of the plot are you going to pull on them?

Another advantage would be reliablity. Don't take it the wrong way, but I bet you have to rebuild before the LS1 does.

I'm not being an *** here (more of a devils advocate). Correct me if I'm wrong.

 

I think I'll just stick a Rolls-Royce Merlin engine in the FD and be done with it....

 

FWIW I don't think you could go single for the cost of the LS1 conversion. i have around $7K into mine, including the LS1/T56, new fuel pump, Conversion pieces, new coilovers, brake pads, brake caliper rebuilds, etc.

I took a look at going with the gt3540 setup, and I figured it was going to cost me about $16K if I went with all of the parts I wanted, and I bought them all new. My car was almost completely stock with 91K miles on the original engine and turbos, so I was looking at rebuild/porting costs on top of the price for the turbo kit, intercooler, upgraded fuel system, ecu, etc.
It all adds up pretty quickly.

So, for the price of going single, I think I can pull off the LS1 swap and upgrade the suspension and whatnot.

As for buying a C5, get real. It's a much bigger car than the FD, and not anywhere near as nimble. It would take an assload of work to get the C5 to "feel" like the FD. The biggest disadvantage I've seen so far to the LS1 swap is all the close minded rotary purists who insist you're "ripping the soul from the car".

 

i guess you guys on this forum are too young to remember a little sports car from the uk that had a v8 put in it, it was called a ac cobra ,aka shelby cobra.the panoz has a ford v8 in it and it seems to be quite a good sportscar. I would love to drive a cammed Ls1 or Ls6 in a fd.

 

LS1 Definately.

 

As many times as i've shaken my fists in the air, looked heavenward, and cursed the rotary engine's general existence, I don't think I could do it. I bet it would be a great car, but I still couldn't do it.
The car is the car.......and it's a great one. I would do a single. Actually, I am doing a single.

 

Of course, but I want to do it someday just to **** people off

It may take more flow, but you know you can easily get 700hp out of a 20b with a single turbo. Come on. Pettit can get 550hp out of it with STOCK twins. Of course, we are talking major MUUUULA, but it will still be a rotary

I have nothing against V8s. I've had several V8 cars and plan to have another one again (Early 70s Trans Am) I just think what came with a car (at least same family) should stay in that car.

 

Im also thinking about a 400RWHP ls1 in FD VS. a 400RWHP turbo FD....

If I could get someone here the engine/trans only...How much would it be to put it in all all the other crap

Cause I wouldnt put a stock motor in...think about a 383 stroker motor with a direct port 250 shot or supercharger...

IM VERY curious about the exhaust note...does anyone have a video, I want to hear how their custom fabricated exhaust sounds....

THis also seems like a good idea cause I could use alot of extra parts from my car now...MAF, headers,ls6 manfold, ect...

I like the way RX7's sound though...IM glad I still have ALOT of time to think about it

 

From most accounts i've heard is that most people are fairly happy with their re-builds, and unless you push the envelope, as is the case with any engine LS1 or not... you will blow seals.. weather O rings or apex seals.. so why try and get 800 RWHP out of an engine designed with 220RWHP in mind... Try that ratio on the LS1 with turbo and see if it'll last more than 100K...
I say do whatever floats your boat, and has your goals in mind, if an 800 Hp FD is in your dreams... do it ... LS1 or Single... who cares you're gonna go through cash like a hot knife through butter either way....
-DC

 

ahh who am i kidding....turbos are the $hit

 

That is essentially correct. May I ask, however, what you think the performance envelope of the LS1 is? It certainly is a hell of alot higher then the 13brew. That same ratio you mentioned will put the LS1 at about 1200hp or so........550hp can be a nice reliable 20+mpg engine. THAT my friend is why I think the LS1 would be sweet in the FD. 550 all day long? Holy $hit it would be awesome. 800hp would be pretty streetable also, a charger and a 150 shot would give you that easy.

 

Videos:

one of exhaust before it was 'finished'
http://www.hinsonsupercars.com/Hinso...arsLS1RX7s.mpg

One of the 11.9et, its best pass was a 11.4 so far....
http://www.hinsonsupercars.com/LS1RX7tracktesting.WMV

 

nice videos...got me thinking ls1 again...it just wouldnt be a rx7 with it...but then again I dont want to dump like 12 grand into a single turbo 13b and then have it crap out on me after 15,000 miles...

 

bingo stik6shift00...

b/c you know it will

 

already had my street ported 13b w/ garret single... It was fast, unique, sounded kinda cool, boost is good..
4000 miles was pretty lame considering all the money that was spent on it...
My vote, LS1 swap, because thats what im doing this winter, except using the zo6 engine.
---its been proven on many websites, that the ls1 w/o a/c and PS actually weighs less than the rotary w/ stock twins. Also,, with battery relocated to the back, its damn near 50/50 weight distribution as well.
so lets think...
v-8's...
1. less expensive than a rotary
2. less maintanance than rotary
3. other than cali and FL, tons of LOCAL shops work on ls1's
4. 400 HP completly stock
5. brian hinson proved mid to low 11s w/ a 350RWHP ls1 in a FD ON MOTOR!
6. Sounds mean/tough,,, unlike the sweet sound of a bumble bee
7. if turboed or S/C,, 10 PSI to a ls1 is like what? 650 RWHP??

yeah yeah, the purists, like 99.9% of this board say an rx7 isnt the same without a rotary. Well, seeing how it weighs less, and handles the same if not better, aside from the sound how could it be not the same????
exactly, One more FD w/ a v8 next year.....

 

I keep switching back and forth. I like the idea of a 400+ rwhp single but with all the problems of getting one running and keep running that a LS1 would be better and cost just as much as a correctlly set up and tuned single.

later Gun

 

Well, consider the way the car drove when it was originally designed:

Great power all around, good throttle response, handling oriented... a superb road racing vehicle.

If I want my FD to behave like that AND have tons of power, what shall I do??? I don't think a big single turbo setup is going to do very well in autocross or road racing. Correct me if I am wrong about this.

A LS1 or LS6, on the other hand, will keep the car's powerband more like a stock powerband, only shifted vertically by a couple hundred lbs of torque.

This is certainly a personal decision rather than a matter of X is better than Y. If that were the case, then there would have to be some kind of "absolute" criteria that would determine the outcome. These criterion do not exist, therefore, you decide what you want. If you value the rotary engine and it's nostalgia more than reliability and low end power, then by all means, make yourself a badass single turbo FD. If you don't have enough money to keep replacing motors, but you want an awesome car with loads of reliable power, then by all means, throw the 5.7 pushrod v8 in it.

 

Ummm lets see... the LS1/LS6 engines make huge amounts of torque from about 1200rpm to redline and they do it with instant throttle response.

You're car is flat on it's face until 4000rpm.

And.. it'd unreliable.

 

this will never allow in the cali emission test.. never streetable..

 

Let me think about that for a while.