inactiveuser92616

I was mistaken on the details for the rx7. It is a "79 Mazda RX-7 with a 509 CI Big Block Chevy, probably pushing about 750 HP. It ran a 9.28 at 146 in Phoenix." Straight from the guy's post. He doesn't BS either, he posted his honda;s blistering 15.8@86 as well. Sorry, my memory glorified it somewhat.

Robby

Fair enough... thanks for the info- regardless, a 9.28 is AMAZING!!!! Damn- some of the fastest stock production street cars in the world can barely hit 0-150 in less than 25 seconds & here this guy is almost at that speed by the 1/4 mile & gets there in less than 10 seconds... that's unreal when you think about it... Anything that breaks a sub 13 has my respect b/c that will put most street cars to shame.. M5's & C5 Vettes, etc, are all a hair over 13- the Turbo S was a 14.2, etc... it's all relative... What always amazed me about Ray Lockheads car was that his engine fit under the hood... it was tubbed, etc, but otherwise, could pass for bone stock in the looks department. I'm thinking you could get a fairly streetable RX7 in the low 11's on semi-street tires & have one serious sleeper... Not sure how long it would last... Anyway, it sounds like 300RWHP in a 3rd gen can be reliable if done correctly & wouldn't be too terribly much money. That would be a great car... Not everything has to be able to outrun a Viper to be fast... Also ,the handling of the 3rd Gens was amazing- I've seen several tests w/them pushing 1.0G's...

sillbeer

200RWHP on an NA 13B is pretty hard. it'd have to be weber carbed, peripheral ported and create enough noise to burst your eardrums. I have a 3 rotor FC, as does my buddy. and they arent slow. =)

Robby

What do you mean by 3-rotor? How many rotors are there normally? I remember an article, years ago, where they dropped another rotary engine in the rear of the car- I wasn't too impressed w/the #'s as they barely broke 500-impressive, but for all the added weight & complexity, it didn't seem worth it to me...

Also, are the FDs sequential TT or what- how do the twin turbo's work? When people change out the turbo, do they keep the twin-turbo configuration or do they go single like the Supra TT world often does?

Has anyone ever actually weighed a rotary engine? Did they change very much from year to year? The 951 engine is really kind of heavy- for years the VR6 has been considered very heavy, but it barely breaks 400lbs- well, the 951 is 404lbs, 944NA, ~355, 3.0L S2, ~375, & 968's a hair under 385. Thus the reason for the 968's better weight dist over 951. I think the LS1 w/aluminum heads is barely >400lbs. The W8 is 419lbs & Carrera GT is 479lbs. Anyway, sorry for all the rambling here- just wondering how much weight the rotary really saves. It's also interesting- those who don't understand rotary's always say it's unreliable, but those who do understand them swear by them as one of the simplest most reliable engines made...

Also, has anyone's turbo charged the new RX8 rotary...? That chassis is far stiffer than any Mazda before- would be an excellent chassis for a 300+RWHP engine, even if one doesn't like it's looks as much- one article said the chassis had enough room b/c of the engine to allow for a front multi-link suspension. The RX7 had a rear multi-link. This is one area the 951 will never catch up. I've always wanted someone to put a 928 multi-link in a 951, but I'm sure it would cost a fortune.

This thread is making me want a 3rd Gen RX7 again... Does anyone else think a newer Miata front end w/out pop-up headlights would look good on one? Has anyone ever seen an RX7 w/out pop-ups?

Legoland951

All U. S. rotaries are 2 rotor while some of the Japanese motors in the Cosmos had the 3 rotors. My former business partner used to street port, peripheral port, and bridgeport these motors back in the days. I just had to buy the cars for him to build it. There was a kid who built an RX2 with a junkyard motor and did 12 second quarters. We used to joke around and told him the only reason his car went so fast was because of the rust holes lightening effect on his car. I think in total he spent less than $1500 on the car including the bolt in cage.

I have a picture of a 1981 rx7 we built 13 years ago with a 454CI chevy bigblock/turbo 400 trans in it. The hood shut with a small slit cutout for the carburetor air intake. I took the car apart a long time ago but still have the custom crossmember and driveshaft that goes straight from the turbo 400 and bolts directly to the rx7 diff. If I had to do it all over again, I would shove a turbo V6 from a buick type T instead of the bigblock. Maybe one day...

Zeff

If you get an FD get the 99 front lip without the tag mount. That > everything

J1NX3D

heh, we call them Series 1 to 6 down here in NZ and Aussie rather than 1st - 3rd generations. Theres even 3 guises of the FD (series 6) that get called series 7 & 8!