N/A Low 5's doable Yes or No Lets Hear It

I decided to start this so we didn't high jack the other thread of the A head fellow. Trying to figure out if this is a reasonable build or not. Want to run N/A in X275. Engine cannot be larger than 588 and a C-head single carb. Car can weight 2900 in N/A form. I do like the idea of going the prostock route and spinning the guts out of it. I'm thinking it will take 1,400hp to get it done. What yall think it will take to get this done. Other than $30-40,000 lol. I do have two years to put it together. So I have plenty of time. So doable or should I plan a different route? I really want to run a BBF N/A too.

Bring on the crazies

Yea I think its doable.

Should it be 588 or try and turn something smaller? I have learned in the past that bigger aint always better.

Well that depends on the whole combo, Trans / convertor, Suspension, Gearing, Etc.

Using say a Glide... 588" is probably good.

Using a 5 speed.... a 588" may hit the tires too hard...... a 500" motot may be more appropriate....

If you're gonna spin it high, I'd go with a 4.300" stroke 572.

yeah i should have know that was coming. Glide, stock suspension car, gears not for sure.

rmcomprandy wrote:If you're gonna spin it high, I'd go with a 4.300" stroke 572.

WHY A 4.300?

LBSRACING wrote:I decided to start this so we didn't high jack the other thread of the A head fellow. Trying to figure out if this is a reasonable build or not. Want to run N/A in X275. Engine cannot be larger than 588 and a C-head single carb. Car can weight 2900 in N/A form. I do like the idea of going the prostock route and spinning the guts out of it. I'm thinking it will take 1,400hp to get it done. What yall think it will take to get this done. Other than $30-40,000 lol. I do have two years to put it together. So I have plenty of time. So doable or should I plan a different route? I really want to run a BBF N/A too.

Bring on the crazies

yes this can be done

BOSS 429 wrote:

rmcomprandy wrote:If you're gonna spin it high, I'd go with a 4.300" stroke 572.

WHY A 4.300?

Even a 4.150" stroke with a single 4 barrel.
A shorter stroke will allow the engine to run consistantly at higher RPM due to piston speed vs. total air flow through the engine with a single 4 barrel

At only 7,500 RPM the piston speed of a 4.5" stroke engine is already over 90 fps.
A 4.300" stroke will allow another 400 or so RPM higher and a 4.150" stroke gets about 700 more RPM at almost the same piston speed.

If there is no intention to spin the engine over 7,400 RPM, then the point is mute.

I can see the theory behind the shorter stroke.

rmcomprandy wrote:

BOSS 429 wrote:

rmcomprandy wrote:If you're gonna spin it high, I'd go with a 4.300" stroke 572.

WHY A 4.300?

Even a 4.150" stroke with a single 4 barrel.
A shorter stroke will allow the engine to run consistantly at higher RPM due to piston speed vs. total air flow through the engine with a single 4 barrel

At only 7,500 RPM the piston speed of a 4.5" stroke engine is already over 90 fps.
A 4.300" stroke will allow another 400 or so RPM higher and a 4.150" stroke gets about 700 more RPM at almost the same piston speed.

If there is no intention to spin the engine over 7,400 RPM, then the point is mute.

Spinning the engine over 7,400 is the intention if need be. Not scared to if thats what you mean.

I respectfully disagree. I do not think 1400 Hp out of a single carbed, C-460 headed engine is doable. Be it either a 572 or 588 CID engine.

Let me go on to explain that I mean 1400 real Hp. Phillip Oakley has recently made 1.80 Hp to 1.88 Hp out of single carbed big inch Sportsman engines, and he's as good as anybody I know of. Is 1.9 - 2.0 Hp doable? Maybe, but by then we're talking some pretty exotic stuff such as spacers for reducing the main bearing diameter, titanium wrist pins, big diameter lifters and the list goes on.

Do you need 1400 Hp to run low fives in a 2950 lb car? No, more important is to have a scienced out chassis and convertor combo like Colin Wigle's car. More than likely, he changes convertors, shocks and springs more times than most guys change spark plugs.

Charlie Evans

what heads can you run with a power adder?

richter69 wrote:what heads can you run with a power adder?

A-head

Hey Richter it seems like you should be doing mid 5's mabe 5.40's. Wasn't you running 5.60's to 5.70's.

LBSRACING wrote:

richter69 wrote:what heads can you run with a power adder?

A-head

Limited Power adder or ?????

This might be the route to go if your allowed 2900#, 588", A460 heads and Spray.........

power adder is 3300 for spray if i remember right

You can do the math... But a A460 headed 588 will get you 1050-1100 range if pro built (Might do a tad more) and put a 600hp Fogger shot on top of that...... on a DR car the wieght providing you can move it around may actually be an advantage???

Yeah I was close on the weights. I was wrong on that I would be on the same weight as the big chief head at 3050.

Naturally Aspirated (small block) 2600 lbs
Naturally Aspirated (big block with standard deck height and conventional head) 2900 lbs
Naturally Aspirated (big block with tall deck height and conventional head) 2950 lbs
Naturally Aspirated (big block with standard height and big chief head) 3050 lbs
Nitrous (small block) 2950 lbs
Nitrous (big block with standard deck height and conventional head) 3250 lbs
Nitrous (big block with tall deck height and conventional head) 3400 lbs
Single YSI / F1A/6-71 Supercharger (small block) 3100 lbs
Single F1C/8-71 Supercharger (small block) 3200 lbs
Single F1R / Xi/10-71 Supercharger (small block) 3300 lbs
Single 76mm T6 Turbocharger (small block) 3000 lbs.
Single 80mm T6 Turbocharger (small block) 3100 lbs.
Single 85mm T6 Turbocharger (small block) 3150 lbs.
Single 88mm T6 Turbocharger (Y2K or GT47-88 ) (small block) 3200 lbs
Single 88mm T6 Turbocharger (GT55-88, Pro Mod 88 or =) (small block) 3300 lb
Single 88mm T6 Turbocharger (Large Frame 88) 3350 lbs

c.evans wrote:I respectfully disagree. I do not think 1400 Hp out of a single carbed, C-460 headed engine is doable. Be it either a 572 or 588 CID engine.

Let me go on to explain that I mean 1400 real Hp. Phillip Oakley has recently made 1.80 Hp to 1.88 Hp out of single carbed big inch Sportsman engines, and he's as good as anybody I know of. Is 1.9 - 2.0 Hp doable? Maybe, but by then we're talking some pretty exotic stuff such as spacers for reducing the main bearing diameter, titanium wrist pins, big diameter lifters and the list goes on.

Do you need 1400 Hp to run low fives in a 2950 lb car? No, more important is to have a scienced out chassis and convertor combo like Colin Wigle's car. More than likely, he changes convertors, shocks and springs more times than most guys change spark plugs.

Charlie Evans

I agree with Charlie to an extent. I think he will need the 1400Hp to run the number he wants with the TIRE that he has. You pretty much have to manage the power where it need be ( on the leave to the 100 foot mark ) then run the guts out of it on the top end and hope it sticks. I don't think the 1400 hp on the motor is possible, 1250 yes with a LOT of work and tuning.

JMO, don't shoot the messenger,
Travis

"Nitrous (big block with standard deck height and conventional head) 3250 lbs"



P51 deal with a fogger at this weight would be a good combo..........

do you want to win ? do you want to be competitive ? or just run in the bottom of the qualifing ladder ?

90's will win , 0's will be competitive and teens will get you in hugh diff in those times at that weight expecially with a 275 deal just saying

Tennessee Bullitt wrote:Hey Richter it seems like you should be doing mid 5's mabe 5.40's. Wasn't you running 5.60's to 5.70's.

put his car in x275 trim and it would never run that # ......... his deal would have to leave softer and the 330' would suffer

You mean it would have to leave like yours Nick?

richter69 wrote:You mean it would have to leave like yours Nick?

ha ha your a funny guy ...my car leaves like a turtle ...not even soft