christianRX7

iTrader: (1)

F1blueRx7

iTrader: (5)

wow.

No.

302_fd

so the indy car motor would interest you?

The 15k thing was an "for instance" type thing. Your right about not researching your mods well, and blowing yo **** up, its true, but even you have to admit it in our nature to f*ck with stuff, and not to be able to leave stuff stock. If that were so you would have a 255hp stock motor.

But enough is enough. lay off the hijacking, read the forum title....this aint glorify the almighty rotary engine thread....youn can start that in your own section.

I have a lil piston powered rx7 near me that will flat out take any rotards street money...get mad all you want, but realize he takes a hell of alot of piston motors money as well

ptrhahn

iTrader: (9)

Dude. Chill the **** out. There was no "rotary glorification" or hijacking in my post, I simply said—get the ******* chip off your shoulder, if you blow engines every 15k, it's your fault. What the **** all do I care if you've got a friend who's car is faster than mine?

I posted directly to the thread title, "what V8 would you stick in your rx7". Answer: I'd rather it be one of a character that I think is more in keeping with that of the rest of the car. I think a flat crank, gear drive V8 RX7 would be cool, but it doesn't really add up as well in the bang for buck column.

302_fd

That last part wasnt from me, I had left the room, and my ******* friend put that **** on the post. From the part from "before" onward was his dumbass, it was his car mentioned, and he made an *** out of himself. I will edit it out. Sorry for his lack of intelligence.

ptrhahn

iTrader: (9)

My apologies for my snotty tone nonetheless. Totally uncalled for. Thanks for PM'ing me so we can address it like adults. The forum needs more of you!

Back to our regularly scheduled programming: Yes, I see the FD as very european in concept—very much a japanese Lotus (complete with oil leaks)... so to me, something that sounded and revved like a Cosworth seems more in character!

302_fd

I should have said "from but enough is enough" instead of before, still strying to find that edit button, must have fallen off my browser. My friend Jacob is now hanging by his nads on the back porch, paying for his deed.

The V8 Hayabusa motor would be cool, it makes 400hp and weighs a scant 200 lbs, but the 40k pricetag is damn steep!

ptrhahn

iTrader: (9)

^^^

Maybe a high-revving, high-compression, all-alluminum 289 small block ford w/ flat crank and gear drive. Would sound fabulous... and be like the "FIA" cobras that ran in Europe in the 60's.

cozmo kraemer

I think the LS series does just fine. From a driver's point of view my car is TOTALLY in the spirit of the RX7 there is no denying that. I have had discussions with Peter through these threads over and over and I can promise you that the car is every bit as inspiring as it was with the rotary. It is MORE responsive and there is no upset to the handling or balance. Peter, have you driven a well put together LS1 FD?

Maybe because the engine came from a "camaro" it isn't up to standard... but it comes pretty close to meeting your requirements. It is relatively high revving (up to 7000 rpm in certain street applications, complete race engines can go to 8000, my 100% stock engine revs to 6300 which is plenty with the way it is geared and the torque curve), it is high compression, it is all aluminum...etc. I can attest to it being more responsive to throttle than the rotary, and the torque makes the car feel even more like a go kart, just instant power. I think if anything the V8 amplifies the RX7's strength, which is that of responsiveness.

Sometimes I think you give the FD a little too much 'exotic' credit. Like it should have a flat plane Ferrari V8 or something... Just because the engine most used is common, doesn't mean it is not capable.

ptrhahn

iTrader: (9)

Cosmo, you didn't read what I said. I made no empirical performance based judgements about your or any other LS-based RX7.

Simply stated, pushrod V8's are uniquely American in character (a good thing), and the Rx7 is quite european in character and aesthetic (also a good, but different, thing), so if I were to swap a non rotary motor into an RX7, I'd want to put something in it that also has a european character. That doesn't mean there's anything wrong with one or the other, just my personal money-no-object preference.

1 sic fb

put the ls1 into the fb and go low 11s with a stock motor. =]]]]]

cozmo kraemer

I didn't misunderstand. I know exactly what you mean. My point was that if you didn't know what engine was under the hood...and you drove the car... it wouldn't feel out of place with the LS engine. It just doesn't...

Maybe the engineering is uniquely american (push rod) but an LS1 FD does not feel like an American car in design nor application. The car feels very european with that engine and the FD chassis.

I can see how the LS1 could get a little bit of a sideways glance because it came out of a camaro...but the way the engine performs and feels it could have just as easily came out of a mercedes or bmw.

It actually sounds a lot like the CLK black series. I got to hear one of those in person with an opened up exhaust and i was almost floored at how similar it sounded to my car.

But anyway...

I think you are defining character by design characteristics and I am defining character by application and performance characteristics. That is our disconnect.


My money no object V8 swap would be a katech 8000rpm sneak attack NA v8 based on the LS7. That would be insane in this car. Too bad the engine is $30k.

KAT-A4725 Sneak Attack LS7: 5.7L, 346in3
With an 8000rpm redline, this crate engine is ideal for that "sleeper" ride. Package includes LS7 case, Katech forged piston-rod assembly, forged crankshaft, LS7 cylinder heads, and an LS7 derived valvetrain coupled with Katech specified camshaft.
2 Stage dry sump oiling system
For off-road racing use only

Application: Racecars with displacement-limited classes, customers wishing to rev over 7000rpm
Displacement: 346ci, 5.7L
Bore: 4.125
Stroke: 3.240
Compression ratio: 12:1
Fuel: 100 octane
Horsepower: 580
Torque: 500
Block: LS7
Heads: LS7
Crank: Callies forged steel
Connecting rods: Carrillo A-Beam forged steel
Pistons: Katech forged aluminum with DLC coated pins
Camshaft: custom
Oiling system: Dailey 4 stage
Throttle body: 90mm electronic cable
Intake manifold: LS7

Or a more standard LS7

KAT-A4730 Street Attack LS7 : 7.0L, 427in3
Top-tier LS7 performance engineered for street applications . Crate engine features Katech 11:1 compression forged pistons, solid small-end rod bushings, Torquer LS7 camshaft, and valvetrain enhancements. The perfect choice for high power, daily driven vehicles.

Application: 2006-2009 Corvette Z06, Hot rods, off-road vehicles, show cars
Displacement: 427ci, 7.0L
Bore: 4.125
Stroke: 4.000
Compression ratio: 11:1
Fuel: 93 octane
Horsepower: 600
Torque: 570
Block: LS7
Heads: LS7
Crank: LS7 forged steel or optional Callies forged steel
Connecting rods: LS7 powdered-medal Titanium, rebushed
Pistons: Katech forged aluminum with optional DLC coated pins
Camshaft: Katech Torquer LS7
Oiling system: LS7 dry sump or optional ARE Stage 1, 2, or 3
Throttle body: 90mm electronic or cable
Intake manifold: LS7

Josh18_2k

iTrader: (3)

i think a common misconception is that the LS1 is the same, or at least very similar to a small block chevy, when in fact they are quite different.
LSx's dont feel or sound like the all american SBC's everyone is so familiar with. its far more 'european', if you wanna call it that. smooth and high revving.
they definately dont drive like a 350 powered 70's car.

bprotary

i rather go for a boosted 4 cylender so i can take tursn faster v8 are so hevy

ptrhahn

iTrader: (9)

I'm pretty sure I don't have any "misconceptions" about Lxx V8's. I've driven cars with the motors, and I'm familiar with the sound and power delivery. Both are great. Neither are ideal for the RX7 for me. They seem out of character.

I'd want something higher-strung and higher-pitched (like a flat crank), and more exotic sounding, i.e.: more like the smaller displacement turbo motor it came with. That's it. Stop approaching this as though it can be combated with logic about how great your car is. I'm sure it is, and yet I feel differently about what I'd want for my own.

JustinStrife

iTrader: (2)

My LS1 weighs less than a KA24DE by 100 lbs, and about 150 lbs lighter than a KA24DET.

Pretty sure it's about as light as my S14 SR20DET or maybe even lighter.

cozmo kraemer

I never once said how great my car is nor have I even implied it. I am saying it isn't what you are saying it is. I am saying that is much different than you think it is... I am guessing you have never driven one that was well set up... The power delivery of the v8 amplifies the responsiveness of the FD which is what I believe is it's biggest strength.

And we can get into the same argument where what you perceive as exotic is not what I perceive as exotic. What is exotic and what sounds 'right' are all a matter of preference.

I can absolutely promise you that an LSx FD is nothing like any GM LS powered car. I have driven Corvettes, including the new Z06, drove a CTS-V..and a track prepped SS Camaro. The FD is totally different.

ptrhahn

iTrader: (9)

YES, OF COURSE.

It's a matter of preference, and that's all I offered. This thread is ABOUT preference, i.e.: "what would you do..." relative to a V8 RX7. To me, the American V8 doesn't seem in character, if for no other reason than sound. Sounds good. Doesn't sound RIGHT, to me. A frenetic, buzzing, screaming flat-crank gear-driven sort of thing would. That fits my perception of the car.

Yet somehow, you're trying to counter my preference with your preference, as though either are logic based, or there's an "arguement" to be won. Seriously, I concede that your car and others like it are fabulous in all sorts of ways. My driving one would likely only make me more convinced of this, YET, it isn't what I would do given my preference.

JustinStrife

iTrader: (2)

A 2 stroke weed wacker belching flames sounds exotic you mean.

ptrhahn

iTrader: (9)

Isn't it?

I'd want to retain some of that character in my V8. If you've ever been to a race track, there's a huge sensory difference between when a Ferrari, or Cosworth powered car goes by and when a Corvette or Viper or Cobra goes by.

JustinStrife

iTrader: (2)

Considering you hear the same thing in the desert, I'd say no.

You want exotic, listen to this.
http://www.youtube.com/watch?v=vuaxusf5VVU

JustinStrife

iTrader: (2)

I've raced against Lamborghini and Ferrari's. They sound amazing, and look absolutely gorgeous. I'd own one of each of them all if I had the means.

The 13b isn't even in the same league, let alone ballpark as an exotic.

ptrhahn

iTrader: (9)

Goddamnit, I did not say that a 13b is in the same "league" (whatever the **** that means) as a Lamborghini or Ferrari motor. Why is this so ******* difficult to comprehend?

The CHARACTERISTICS of european sportscar motor are different than those of an American sportscar motor (typified by a pushrod V8 of large displacement). European motors are typically smaller displacement, less torguey and more peakey in power delivery, and have a more high-strung sound.

You may not like the sound of a 13B, but this thread isn't about wether you like 13B's. It's about what sort of V8 you'd put in your RX7, and I said I'd want one that was in some ways more like a 13B in character than a pushrod American motor, and that would be more like a european sportscar or racing motor (like a Cosworth).

HOWEVER, if you want to get ******* technical, the definition of exotic doesn't mean "expensive", "high end", or even "of fine quality". It means:

exotic
Adjective
1. having a strange allure or beauty
2. originating in a foreign country; not native
3. strikingly strange or unusual

It came to be used to refer to cars like Ferraris and Lamborghini's because they were indeed rare, foreign, odd, and striking relative to "common" cars. Not all exotics are necessarily high end or even great cars. They're just foreign and different.

JustinStrife

iTrader: (2)

Well the rotary fits under #2 and #3 but allure or beauty, I'd have to say no.

Although Chevrolet had played around with the rotary idea in the past, before deciding it didn't make sense to go that route. So #2 isn't totally accurate either.

Interesting discussion though. We're all definitely made from different fabrics yet one car brings us all together.

bosscobra

iTrader: (1)

someone mentiond the 4.6 dohc in an fd, and it being hard to fit,it in fact will not fit at all, i had the demensions laying around one day and walked out to my car with a tape, put the tape to the ground and extended it to the hight of the 4.6 dohc cobra motor, and well it pretty much went all the way to the hood, this measurment was taken from the front tire. as far as what v8 i would put in my car, if money wasnt an issue, a mercaides 6.2L out of a pagani zonda R 720hp stock, sounds amazing, the 2.8-3.0L busa v8 was mentiond, i would take the 3.0L version and yank the pistons out and replace them with 9.0:1 and throw a nice turbo on there, ive seen the busas in 4 cyl form put down 500hp, so a v8 version should be able to do 800 turbo'd pretty easy, as far as a more budget minded build, i have an ls2 block that i plan on building up with low comp pistons and its either getting a single 67-72mm turbo or twin 62mm turbos, plan is 650-750 rwhp on pump gas with peak power at 7,200 rpm. very anxiouse to get that build goin, get the motorcycle sold and i might be able to get a start on it