My brother is building a car for this class or the stock class and we have theorized about build profiles at length .
Wide LSAs so as not to blow off tires yet carry speed through the rest of the track , intake/exhaust choices and mods , carb selection , chassis set up ,
Gear choices ... such a balancing act .
Looks like you figured it out .
What car is he building?
Congrats on the low E.T. !!! I remember seeing that car at E Town quite a few years ago it was impressive then.. even more so now!!!It has 915 casting J heads, ported with no welding and stock valve size, intake is a factory 71' with porting, no welding or epoxy, ported 71' exhaust manifolds, solid roller cam. Nothing super trick about it, just lots of careful details to get the most out of it. Honestly would love to do a different build but with no one close it's hard to justify it.
pardon my ignorance, but back around post #5 there was weather this was 1/8 mile or 1/4. I assume its 1/4 mile, but since Im following this thread (wicked awesome car BTW) this is 1/4 mile right? You cant have a trap speed that high with that slow of a ET in the 1/8th....can you? Again, Im stupid, but the #5 post threw me off, and Im totally diggin the car!
69 Firebird
They are ported to 270 cfm. Car should run well . He is just looking to have fun and run a decent time . Engine dyno'd at 450 hp. Its a factory 3sp car .If you’re going to be running D port heads....... having them as good as you can afford will be a good place to spend money.
Engine dyno'd at 450 hp.
I’m not talking about whether it will live or not...... just referring to how fast it will go(how much it will be holding back the ET).Pontiac used a Ford truck 3 sp which was stronger than a Muncie I am told.
It’s 1/4 mile.
Considering this is a FAST combo on repro bias ply tires, the 1/8 mile to 1/4 mile conversion for the 10.67 run lines up very closely(within about .01) with what would be a pretty well sorted out bracket car(1/8 mile was 6.793 on that pass).
You rarely see that out of a FAST combo.
Usually the 1/8 mile ET converts to a noticeably slower 1/4 mile ET than what the car actually runs.
Typically, the cars leave relatively soft, so the 1/8 mild times aren’t great, but they pull hard(the good running ones) on the back half.
They are ported to 270 cfm. Car should run well . He is just looking to have fun and run a decent time . Engine dyno'd at 450 hp. Its a factory 3sp car .
That is a cool combo. What's it weigh? You might be able to keep up with the race car...
Brian, low gear set in the 904? I’m leaning that way.
Well, the list of things wrong with my car is VERY long!!!!!!!
Here’s my list of excuses. It is NOT exhaustive!
1) FAT! Not PHAT but FAT! 3445 lbs with the fat guy driving and I’m not going on a diet!
2) solid flat tappet cam, not one of those fancy smancey roller thingies!
3) C12, not that rocket fuel that is clearly melting your brain.
4) did I mention the fat guy?
5) 727!!!!!!! Fat!!!!!
6) The second largest piece of window glass ever put in a production car! Fat!
7) Tiny tiny AVS carb, not the plastic wonder!
8) no thermoquad intake!
9) lack of talent!
and on and on……..
Haven't heard any follow up on your fabricated Frankenstein intake. Curious about the performance results +-.Yep, going Sat. Hoping for mineshaft air and sunny day. Get some heat in the track. Only supposed to be 45? We’ll see what the 904 does for it next year. Pulled the 904 apart from the other fastback. Looks good, no red flags or excessive wear. Going to go through it and address the weak spots, get 5 clutches in it, install the low gear set, and move the RMVB over from the 727. I’m still NOT going on a diet! I won’t put a bar in this one. Original 340 car and all. Would probably just swap everything over to the goldfish and put a bar in that one, but I’ll burn that bridge when I get to it!