just some interesting issues... - DRAG PLACE FORUM

luv737superpro · 10-02-2008, 10:29 AM

i was at a game game last night sitting with my girlfriends dad and I race with them (that how i met my girl) and we got to talking about it and he really wants me to drop the luv off to him this winter after bowling green in november and wants to play mad scientist with it and make it fly. We was talking about turning it hard and that we could use 17:1 pistons and that he could make it work and that as long as he put the right rod bolts in it that i could spend my small block to almost 9 grand with some spray and make it run run 5.20's. He thinks he can push me from the 6.30's i run now on motor to 6.0's or 5.90's with what what ive already got under the hood with some tuning...i know a decent amount about motors and have never used more than 13.5:1 pistons on a motor. I just dont know how reasonable that is and quite frankly i dont know if it would love, but at the same time i know what he has ran before with big blocks set up this way. He will do the work free as long as i pay for parts, and it helps that he owns a shop... I just dont know if small blocks bracket motors can hold together all season like that...he says it can and that he can tune the entire chassis and motor. I mean making 6 or more passes every weekend from april through october and once in november....what do yall think...it scares me and i dont need to spend a ton of money mid season to put another one together. Plus, he thinks we can run 2 or 3 stages on it in the 1/8th mile..... (one leaving, one at 60ft, and one about the 330). Sounds crazy to me, just never seen a bracket motor with that much compression or that much spray to it....but that would be a scary chevy luv and turn some heads at the same time. This motor is preppef for nitrous and i want to put some to it....just dont want to push it too far and destory it...jsut need some thoughts on it

luv737superpro · 10-05-2008, 09:10 PM

so apparently has any thoughts or opnions on how hard to go???

blwilliams · 10-14-2008, 11:49 PM

Mr. Luv, I'll take a stab at your situation.
Just remember, you asked.
You will be in for quite a challenge to get 17:1 with your swept volume.
Regardless of how much CR you get, will you be running alcohol? If not the race gas required will be very pricey.
If you are running alcohol, will you be spraying with gas or alky?
If you plan of trying to make power at 9000 RPM do you have the camshaft and valve train that will run up there?
You can forget about running steel rods and factory or imported crankshafts, pistons and pins will need to be feather weight as well as a narrow low tension ring package, plus the pistons will need gas ports to go along with the low tension rings.
To make power at that high of RPM you will be sacrificing lots of low end torque and you can pretty much bet that none of your current transmission, torque converter, tires and rear gears will be the correct ones.
Since this is a bracket car with no restrictions on cubic inches or induction. Have you giving any thought to more CI and or better induction? IE, blown, turbocharged, FI?
This is just a quick thought to your request, but if your up to the challenge and get along well with your GF's dad it might just work out for you in more ways than one.
Best of success with what ever you decide.

luv737superpro · 10-15-2008, 09:01 AM

i think it would be fun to build a nasty nasty bracket motor. But ive looked into some other ideas and i found a killer deal on some 15 degree heads. I know i could make about 900hp on 427 sbc but i dont want to turn it that hard...only make about 750 or so. But i figure if i can find those right parts with trying to push the parts hard. (bout 14 or 15:1) and good rods and all that...i would rather find those good parts instead of trying to push soe 23 degree heads 17:1's and spray. Nitrous doesnt bother me...but im not spraying that much. Maybe 150-200 per run for 2 seconds....but im not doing 3 stages

and yes....i run on alky

blaneym · 12-11-2008, 12:00 AM

blwilliams is giving you good information again. I have personally ran a 9,000 rpm in the past but the maintenance goes up a lot with this type of engine. If you and your girlfriends dad decide to go this way I would still keep the shift point down to about 8,200 and gear it to go through the finish line at 8,200 to 8,400 rpm instead of 9,000 and you will see a markable difference in the number of runs you will get out of the rods and crankshaft.

luv737superpro · 12-11-2008, 06:55 PM

well luckily, he has has enough beers to forget about building that motor. But, my only decision now is how big do i want to build my motor. I think a 421 or 427 (SBC of course). her dad wont be building it....but a guy i race with that runs a dragster in the 4.60's in the 1/8th with a SBC will build it i think. I trust him alot more, and his sense of what knowing being consistant is and what just going fast is