well heres my curent engine build all of this going into a 2400lbs 93 mazda rx7
built IRS rear end on 28" MT et streets

tsp 2.5 5.3l heads milled .30
pushrods
ms4 cam
arp head studs
cometics head gaskets
eagle h beam rods with arp 2000 bolts
diamond piston and full seal rings
stock crank
fast 90/90 ported
Electric waterpump
long tune 1 7/8 headers
4" intake with descreend maf
running only 1 accersory alternator
nitrous outlets 90 plate kit 250shot

what kind of et will i be getting with good driving skills ... and about 100shot out the hole ?

what kind of 60ft and trap will be possible with the engine weight combo ?

any info will be greatly apreciated thanks in advance !

 

3.90 or 4.10 gears?

M6 or Auto? You sure you'll be down to 2400lbs race weight? Thats really light for an FD, a FC maybe....

 

4.10 and m6 .. yes around that weight .. have a set of gutted doors and fiberglass rear hatch and deleted everything that wasent needed.... all ac power steering and just about everything out that the car could live with out .

will i need more ??

 

Hinsons car weighed in at 2800lbs (3000 race)

Don't know where you plan to take 600lbs out of the car.

2800lb race weight seems more reasonable if you are all gutted.

 

That sounds stupid fast. 9's should be pretty easy with a 250 shot especially at that weight.

 

u mmm the car stock ways a bit over 2800 ... with the ls1 it does way a lil itty btty less ... ill post pics and some more info when i take it to the scales.. im sure it will be very close to that weight ... trust me .. there is a guy out in the rx7club thats at 23xxlbs and has a lot of things left in it ...

 

Exactly, Race weight is with you in the car.

By the time you add a cage, SFI bellshousing, etc the weight adds up quickly.

Also don't forget that race weight is with you in the car too.

 

hmmm .. ok then maybe 2580 lbs ....

well i havent taken all of that in to account .. but i will try to keep it as light as posible ...

 

It's a nice combination, a 5.3 or what ever in an RX-7. I think your weight estimate is off, too low.. I've seen three of these run at the track, all on street tires, all manual. They will run 11's. That's faster than most Z06's. I caution you about running a 250 shot having never driven the car.....

Sounds like you don't even have the combo together? Sure the car will run 9's. Hell it might run 8's. Generally, most people make small changes to cars and achieve the most success. Are you licensed to drive 9's? Is the car legal? Your 60' times will be 1.4 if you don't blow the tires off, if the tranny and engine holds together, if you don't **** your pants and slide off the seat.

Conclusion, go tell your buddy you have an untested 9 second car. You're headed that direction but I don't think it's really that easy, good luck.

 

Hello, I wasn't ing with you. Hopefully you'll put this combo together. If you build it, build it legal. If you own it get a license. All this crap is required to make the sport fun and safe. If you don't care about yourself, your parents do. I care about the person in the next lane. They have every right to know the car next to them is safe when you race on a drag strip.

 

I may have missed something. I saw 5.3 heads but is it a 5.3 motor? and I would ditch the MAF and go with a speed density tune. my .02

 

Our Camaro went an easy 10.1@133 1.45 @ 3300 raceweight with a 150 shot and a stock cube 11:1 cam/heads setup. That was with a 4.10 and 28's. You should run easy mid 9's on a 250 shot though I think 4.10's will be too much gear.

 

2400lbs will never hapen. More like 2600-2700lbs

Mike

 

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I hope you went to a ford 8.8 of some sort cause the T2 rear end is gonna be history.