I was wondering if anyone was running a solid cam of this size, and are you able to run on the street. I am in the process of rebuilding my motor. I don't even drive the car more than 500 miles a year. Some is street driving getting to and from the track, 80 track time and 20 street driven. What are your build ups? Thanks Mike
Mike Although mine isn't done yet, I'm putting together an 11.0:1 462 with the 308s. I have just about everything I need but I'm undecided if I'm going to convert and port my '70 heads or get a set of alluminum heads. I've heard a GS with the 308s cruisin thru the pits and didn't sound too radical for occaisional street driving. Brakes would probably be an issue, but I won't be using it in traffic.
I run a 308s. Mine is ground on 106 centers instead of 108. With 12:1 compression and 3.5" exhaust with Dynomax Race Bullets the car is very loud. It idles about 1100 and is still rumpity rumpin to well over 3500. It pretty much sounds like your ripping the earth so you have to cut the ignition when passing a cop. And one other thing..............................................it's really cool on the street. :grin:
Shayne, Any other info you could provide about your combination? What heads, porting, gear, stall, etc.?
Sure Steve, I'm not much of a writer so I'll just start throwing stuff out. - Iron heads, flow 276 in. & 210 ex. - 1.65:1 TA rockers - Coan 9", flashes to 4800, having it tightened up to 4400 - 3.73 gears, I think 4.10's would be better - TH400 - Car wieghts 3800 with me in it. - TA intake, worked - 9375 Dominator - Short block is really tired, going to visit AM&P this weekend to get all freshened up, upping compression to 13:1. Ask any other questions you have. The car dosen't see much street duty. Next year I hope tho be in the 10's.
Thanks for the info. What kind of compression do you have in it now? Where are you shifting when you run the time posted in your signature?
My compression now is a tad under 12:1, something like 11.92, I'd have to look it up at home. I shift around 6100 but because the convertor is a little on the loose side the rpms really don't drop much. I only go through the traps at 5800. Keep in mind that after seeing some tuning problems that Bruce Wilson was working through, I believe that I'm running lean on the top end. I guess the 9375 Dominator is designed for a dual carb application so you need to decrease the high speed air bleeds when running just one in order to get some fuel to it on the big end. The car just dosen't pull that good on the top and it dosen't respond like it should to jet changes. Hope this helps
Thanks. That's an impressive combination! I think it's a little more than I need for my car, but not too far off what I want to do. Sounds like you definitely have easy 10's next season. What size tire and what suspension mods have you done? Sorry for picking your brain. You're helping me a lot here.
Currently my tire size is a 10.5x28, I like the 29's better but need more gear. I think 4.10 gears and a 29 or 30 inch tire would be just the ticket with my car. My front susp. is nothing real trick, just Moroso springs and lubed up, hand tightened poly. bushings, and drag shocks. Rear susp. is Globle West lowers, South Side uppers, Wolfe anti-roll bar, Wolfe housing bushings and drag shocks. Another piece of advice I might offer is to either build 10.0:1 and run pump gas or go 13.0:1 and run race gas. Don't worry about anything in between. This is just my opinion but I think that at 11.5:1, plus or minus, you get all the head aches of high compression but without that much more power. Of course now a days 13:1 is considered low compression and your not really squeezing anything untill you get to 15-16.:eek2:
Thanks for the advice. I pretty much have decided to go 10:1 with iron heads, since I don't have the money for a solid/roller rocker setup right now. I plan on adding the stage 1 aluminums and a 294-98F cam later on, most likely. With the smaller chambers, it should be up around 10.6 when I make the change (the iron heads are 73cc). How did you fit 10.5's under the rear? Is it tubbed or mini tubbed?
Shayne - Have you been following this thread? JW went into detail about the correlation between higher rpm problems and valve stem tip heights....might be something there, as far as yours not acting like it should on the top end.o No:
Steve, How do you fit 10.5's? Very carefully :grin: . You know, little trim here, little hammering there. It really not to bad. Scott, Yea I've followed that too. I think JW's theory just applies to the fast ramp hyd. cams. I've hit some pretty high rpms before, just not on the top end with this carb. Got alittle happy in the water box once and hit 6900. If I'm not careful on the 1-2 shift it's pretty easy to hit 6500. Thanks for the thought, anythings possible. I even replaced the fuel pump and filter last season.
Too much tip height would be a problem for any cam...I think the 'fast ramp cams' are even more sensitive to it though. It was a thought anyways. At least if you're taking the car down to AM&P - I'm sure they'll get it sorted out!!:TU: You've got quite nice car there!!:bglasses: :TU:
shayne Awsome looking car!!I run a 29.5x9.0 with 4.10s at 126 i go thought the traps at 6700rpm so i'm gona try a 30x9 to slow the motor down. P.s. I love the way your car leaves what is your short time?
Wow Mike nice ride :TU: My 60's are 1.51, 1.52. I hooks good but just dosen't have the steam to get into the 1.40's. Have you tried the radial slicks yet? I here they're worth some ET. The downside is they don't last and they cost a lot. Also have you thought about a Stage II scoop. I know I've been pretty tempted. Most say it's worth at least a tenth, some have gained as much as 3. I just hate to take off my GS hood because I like it so much.
Yea i was thinking of tring the radials but someone i know had them said they work the same as bias ply and lasted half as long.As for thew stage II scope I think i might run one if i can find a full fiber glass hood with the scope in it.I found a company that make fiberglass bumbers for $180 each not a bad deal.
Shayne, you're on the right track with the carb. I also run a 9375 and Scotty had to change out the air bleeds when we dyno'ed the motor because it was running too lean, just like you feel yours doing. Got mine working great! See Ya.
How is the vacume issue with this cam? Will it work with my power brakes? It sounds like the cam I want, but one thing about going fast is you always have to stop. Thanks Mike
