Anyone out there have a comparison? Have Stg 2 Street Eliminator's now that flow 320's@.600 with good low #'s AND 250's@.600,also good low #'s How much power/ET might there be in going to a STG 3/4 head? Will this be a higher RPM motor with these heads? Right now it likes to be shifted at 6/6200 and goes through the finish line at 65/6700. Not sure about valve size for STG 3/4 heads. Right now I run 2.15 int/1.77 exh. I kinda' like the low RPM operation I have now,but if I think the "bigger" heads will get me a couple tenths I guess I could go 7000,What do you guys think? I know under the right conditions the car has 9.5's in it,so I don't know if the "bigger"heads will improve the combo that much more. What do you guys think?
Spray IT!!! I think:Smarty: That you should spray that thing and take some gear out of it so you can stretch it through the traps. Why spend all that money setting up another cylinder head for only a few tenths. 8's are no problem if you'll just spray it, forget about the 9's. Why compete in the 9's when 8's will blow them away. :blast: You do the math. FLYIN' oN tHE JUICE!!! :stmad: :stmad: :stmad:
I hear ya' Rick....I figure if I sneak up the nitrous application the car won't know it's there and won't break right? Seriously,gotta' finish the parachute mount and wheelie bars before Nitrous,Safety first. Who will be on stand-by with the broom&dustpan to pick-up the parts when I do go to Nitrous Wish we had a block that we could trust:ball:
Keepin' it together 1/8 vs 1/4 WHEN you start spraying it, just run it 1/8 mi. and enjoy. When you feel froggy and want to worry about that dust pan then try a 1/4. If you spray and your smart, it'll live. One 1/4 mi pass on those 455 is like a dozon 1/8 mi passes. Ask Cagle how many time he tore down his motor running 1/8 mi verses 1/4. Are pals next to us at the Nats. would still have a motor if the fast v-8 classes where 1/8 mi. Hmmmmm.....o No:
Have you guys played with nitrous cams at all? I wiped my cam bearings and decided to replace the wild G$CA hydraulic (To make a long story short the car ran like crap. Can't fault the cam, but several bum parts in a newly built car.) with a 308S ground on 112 LCA. Also, I have girdle, Crower Rods and half-filled block stroked to 494. SE heads that flow 308/230. Any ideas how much juice before I need to borrow Gary's dust-pan? Gotta beat the buddy's 2900# 406 Nova with my 3600# tank! Oh, I'm at 5200 ft elev, and yes, 1/8 mile track. Sorry if these are lame questions, guess I'm a bit bored this afternoon.
Hey Adam I think Rick is sneaking up on about a 330 horse tune-up,He's the man with the Nitrous knowledge,I believe you can get away with more in the 1/8,should be able to go low 6's or better with some tuning.
Hey Adam I got one of those G$CA hydraulics and it wiped all my 3 center cam bearings out and it ran like crap but Lunati warrentied the cam but I ended up building the motor I have now.:TU: 112 l/c's on a Buick aren't bad but to make a nitrous cam worth your while you have to be spraying @ 250 or better before it will out run a non-nitrous cam. What pistons ,pins, conveter w/stall, gear, tire, comp., carb, cam specs,are you running with your 494. I do spray 330 hp to my motor but its only a 464 and I run 11.25 comp. not to say You can't do the same but nitrous is almost like running boost. The compression will give you more midrange but it builds alot of cylinder pressure at lower rpm @4500-5000-likes to float cylinder heads and in some cases takes away from the top end. Nitrous motors that run alot of compression do so because they run a 280-290 at .050 nitrous cam with wide lobe centers and needs the compression just to run and bleed off plenty of cylinder pressure with the huge cam, but they make alot of top end HP! An area a Buick has not had alot of success in. The more compression, the less forgiving the juice will be. Bob G. said he tried a couple of nitrous cams and didn't have any luck with them. I think they'll work but you have to know how to dial in the nitrous. Nitrous is very mixture sensitive. A little rich and a 250 shot turns into a 125, too lean and well lets just say its not good. All the NOS kits I've messed with have been rich with stock jets and 6 pounds of fuel pressure. I've always had to turn them down to 5-5 1/2 pounds and run the bottle at 1050psi. When you go with a bigger shot say 200-250 and up you have to start jetting the plate down on the fuel side. But start rich and work your way down and work little shot to big. I think your 494 should take a good hit. Start on a 125-175 shot. Watch for blow-bye - breethers spraying a little to much oil out of them or other signs. If you get too much blow by your probably starting to suck oil by the ring into the combustion chamber and nitrous does not like that, it will detonate. With a fogger you can put plug jets in the bad cylinder. Go with the smallest shot that runs clean. Alway check your plugs!! You'll see speckling or burnt tips if you got problems and catch it in time. Make sure to have a retard box take out the timming when nitrous engages. If your running th400 start with a 3.42 gear in the back. I ran a 3.89 gear w/30" tire and put it on the bumper way too easy and only with a 150 shot. I put a glide and a 4.30 gear and still stood it up with the 150 shot but put QA 1 12 way adj shock to bring thing under control. If you try travel limiters with a small tire (10.5) you probably experience BAD tire shake- and hope you don't break a trans or gears. You sure can't see because it all turns into a blur. Nitrous will make all the torque you will ever need so get that converter tight and get ride of the gear in the back Bob had told me he went all the way down to a 3.31 gear and it didn't slow him down a bit. If you don't have tapered pins in your pistons I wouldn't go past a 175 shot. And even then I'd change the pins ever year to be safe unless you want to swap pins and rebalance the motor. if you have a "motor" converter in it might stall past all the good power if you spray it hard and make it uncontrolable off the launch. I'm cutting this one off. Hope it was all helpful. FLYIN' oN tHE JUICE!!! :stmad: :stmad: :stmad:
great info That is great info. Sure is alot more to running a button than "NOS" makes out to be. Have you ever had any big problems with a buick on spray than just negative traction?o No: thanks Josh
Good so far I've been pretty safe with it so its been good to me and traction has been good so far. I either stick real good or blow the tires off. I've only blown the tires off twice though. FLYIN' oN tHE JUICE!!!:stmad: :stmad: :stmad:
NOS Tips A rule of thumb for Juice and cam choice is pick the the cam that would run best on motor and go the next cam bigger. For example, if a TA 308 cam works great then try the 408 cam on spray. Same with a carb, If a 1050 Domiantor works best on motor go to an 1150. This is the easiest way to go fast on spray and cut out alot of math. Adam your 308 on 112's might work great but I think with all those cubes and juice your not going to be able to move enough air especially without BIG flow #'s. Since you already have the cam try it but be open to go bigger instead of just spreading the lobes.
Gary, we would be happy to help you with your current combination. We were able to pick up Bruce Hunters combination by 70HP and .7 by dyno tuning, cam change and changing the valve job on his street eliminator heads. Brian Earick
Brian What stick are you running now? Bruce must have one serious bad ass motor. GAWD, I hope my 494 turns out that good! I guess I'll have to take the loooonnnggg ride to see you guys.
Sorry for the belated reply! Welp, its sounds like we may have had the same exact G$CA cam in both our engines. Damn, it was tight going in, and I knew better, but did it anyway. ou: Some blowby was evident at the breather, but twisting that much stroke up to 6500 RPM using the stock breather may have something to do with that. I've got JE pistons with their standard .9995"? pin if memory serves me, no taper. 11.25:1 compression, 1000 CFM BG carb, standard 308s profile, just 112 LC. I'm stuck with the TA shorty headers (1 7/8" bleech!) for now. 3.90 gears, 28" tires. Now you tell me on a converter and trans. The car is about 3600#. There is a TH400 in the car with a dead switch pitch (dumb decision at this power level I think in retrospect). I have a new Coan PG or the option of switching pumps on the TH400 and using the Coan converter in it. The converter should stall around 4000-4500 on gas. Rule of thumb is <3000# for a PG, right? Does the N2O send that out the window?
Reynold, many of our great customers are from out of state. Bruces engine made 706HP with the 308s cam. There is more HP to be had in his combination. Give me a call to schedule your engine. We will tune you up also!
Hi Gary, my Eliminator Heads flow a bit better then the number you are posting. I am amazed you car runs that well with your numbers! I think, (but what do I know) if those are your numbers you can do a bunch better with the heads you have. You would have to compare the $'s for replacing with Stage 3's or 4's vs. upgrading your's. For starters, my Eliminator heads have 2.25 inch intake valves...:laugh:
