Well that ends that. lol

 

I must say the LS-1 looks HUGE! In the RX-7 engine bay. It makes the car seem more like a "kit car" other than a normal production car that has been modfied. I did consider the LS-1 as a possible engine choice however I love the uniqueness of the rotary engine .

The car in the photos only weighs 2875lbs. !!! & is a well known Viper killer here in Houston.

 

was a shoehorn a required tool to get that in there?

 

Reading this thread is tiring .
People will do engine swap. Whether we like it or not. So there is no point aruging. Yes the LS1 is ok engine . So is B18C Vtec . LS1 would not work out so great in the rx-8. the reason why the FD LS1 swap worked out so well cause it had extra weight . Turbo/s, intercooler with vaccum hoses/actuators from hell.

I would like the see the weight of the engine LS1 vs 13B/Renesis. just for a little comparision. I like the turbo as a substitute for capacity/displacement. But lately i am loving N/A tuning more and more. Was watching the N2 AE86 series on best motoring ..hehe.. :D 9000-10000rpm tuned race cars makes a noise so yummy.

 

I can't wait till I see the first v8 powered rx8.

 

i want to see a 23a powered rx8 :D


denward

 

how bout a 26b!! a 4 rotor would rape the LS1.

 

somebody should shoehorn the ls7 motor into the rx8

 

How about a turbod 26b

 

LS1's can be made to be very powerful. If we're talking about 3 and 4 rotor engines, you gotta talk about what can be done with the LS engine series also. 4 rotors are pretty heavy, too.

 

Thats true but if all you want is power then a 4 rotor is gonna give you 500hp+(i think its in the 600s) without FI. hell, a turbo 20b can make 900hp. so the weight is not really an issue except for affecting handling. I have nothing against the LS1 im just arguing for the rotor side :D. I guess the real obsticle is your bank account.

 

did anybody happen to see how small the 3 and 4 rotor custom 12a FD's were this weekend at seven stock? the 3 rotor was only 4 inches longer i think then the 13b. the weight balance and distrabution was unchanged in the 4 rotor 12a fd compared to the stock fd. i guess a 4 rotor motor with 12a parts was small enough to not effect the steering colume or firewall. the 3 rotor was putting out 650+ whp at low boost on pump gas! the 4 rotor was predicted to be at 850-950whp on pump gas with a 9500rpm redline!<----- and thats a safe tune!(at least thats what they told me) i think they were both using gt40r's.

denward

 

The fact that the Renesis engine is NA and higher compression isn't the issue. It's all in the tuning. Go search Crispeed over at the rx7 forum. Tuning higher compression rotarys to the tune of 500+ rwhp is his specialty. Now I don't feel the plastic stock intake is up to high boost stress to make that hp.

 

would've loved to see that in person. anyone take pictures?

 

http://www.autotechmotorsports.com/index.htm

more info here. i wish i had taken pics but my camera was stolen the weekend before seven stock. i almost missed the booth and passed off the two 12a powered FDs as regular FDs because well, they didnt really look special. the motors were deep into the engine bay pretty much hidden, the engine bays were dirty and the owners were wearing tank tops, shorts, slippers and looked like they just woke up. kind of a phillipino fobish ghettoish sorta apeal. boy are looks are deceiving.

once i started talking to them, they seem to really know their stuff. they siad they had another car that had 2 12a's back to back merged by the ecentric shaft. not shure if it was a FD platform though. they also have plans to drop a 4 rotor 12a into a rx8



denward

 

I was confused by the claim the LS-1 is only 27 lbs heavier than the Renesis. I was doing a mental inventory of the steel an LS-1 would have and it seemed ther was no way.

Just look at the differences in the cranks... much less the fact that the LS-1 has 4 bolt mains...

Anyway I looked for some weights on the web (where else) and this is what I found:

LS-1 crate 390 lbs... no accessories.
13B racing (best I could find) 242 lbs.
3 rotor 319 lbs.
4 rotor 390 lbs.
BB chevy 684 lbs. (that explains why I was in better shape after the rebuild than before!)

I would say that if an LS-1 only added 27 lbs to a RX-7 then something else changed too...

The pages I found are:

http://www.sallee-chevrolet.com/fram...ckV8s/LS1.html

http://www.gomog.com/allmorgan/engineweights.html

Just so I don't get to roasted for jumping to conclusions.

 

27lbs heavier than the FD's 13b-rew. Alot of extra stuff goes away with the engine, turbos, piping, intercooler, vacuum actuator system for the twin turbo setup, and probably a few more things. That 27 pounds included a tranny swap to a T56, and I don't know the weight difference between it and the FD's stock tranny. It also left off the A/C, and I don't know the weight difference between the LS1 and FD A/C either, but I imagine they are similar.

 

That page lists a couple of the 12A rotaries--with turbo--around 350 lbs. The FD had a 13b with two turbos, right? So the total weight is probably around 365...which would account for the small weight increase of a LS-1. To be fair, you'd have to add in the weight of a turbo kit to the Renesis.

(weight of a bare Renesis) + (turbo kit's weight) - (factory exhaust manifolds)

Whatever that number is would be the fairest comparison...of course the renesis is smaller/lighter than the 13b, so who knows...the LS-1 might add quite a bit more than just 27 lbs.

 

It's where the weight is in space that matters most. An LS1 distributes it's weight over a much larger area vertically and horizontally. Even if it weighed the same as a rotary, it would still be less balanced and will still adversely effect handling. I still say a supercharged 3 rotor in a C6 would be the coolest car ever.

 

you mean to tell me you'd put one of them wankel engins in a corvette?? i heard they're slow and they just blow up especially with a supercharger. they only got 2 liters too, who would change a 6 liter for a 2 liter? you gotta be crazy man!!