Designing a nice street engine...350hp with GOOD low end torque
#1
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Designing a nice street engine...350hp with GOOD low end torque
This summer i installed a 350 in my car. Bottom end is stock, i got the motor used...supposedly low miles. Put a cam in (218/224 .462/.469 110*lsa) stock heads topped w/ performer intake and edelbrok 600cfm. summit headers w/ edelbrock cat back.
the motor is ok, but not what i expected. I want to build a new motor, shooting for 350 hp with some nice low end, but this time i would like to pay attention to streetability/gas milage. this cam isnt bad...i dont have problems stalling or anything. i like the crazy idle but it's not very fuel efficient. do you think it is possible to keep stock heads and make 350 horse? actually, i dont mind so much about the horsepower figure...it's the torque number and where they occur...preferably under 4000 rpms. this motor now doesnt start pulling real hard till about 3000-3500
i would like to hear some suggestions about what kind of cam/heads/intake/carb/headers i should be looking for. also, i'm looking to run anywhere from 9:1-10:1 compression. let me know what you guys think
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350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers
the motor is ok, but not what i expected. I want to build a new motor, shooting for 350 hp with some nice low end, but this time i would like to pay attention to streetability/gas milage. this cam isnt bad...i dont have problems stalling or anything. i like the crazy idle but it's not very fuel efficient. do you think it is possible to keep stock heads and make 350 horse? actually, i dont mind so much about the horsepower figure...it's the torque number and where they occur...preferably under 4000 rpms. this motor now doesnt start pulling real hard till about 3000-3500
i would like to hear some suggestions about what kind of cam/heads/intake/carb/headers i should be looking for. also, i'm looking to run anywhere from 9:1-10:1 compression. let me know what you guys think
------------------
350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers
#2
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Car: Death Mobile
Engine: 666 c.i.
That's a tough job with a carb. Basically, you end up with either more bottom end (but no top-end) or vice versa. Aftermarket heads will definitely help though.
The other solution may be to look at your rear gears and stroking your motor. 3.73s and a 383 would allow you to have your cake and eat it too. (Except the fuel economy issue).
You could also consider converting to TPI, but that has its own limitations and is quite expensive. Go with gears and stroking the engine...and buy shares in the Oil Company where you buy your gas.
The other solution may be to look at your rear gears and stroking your motor. 3.73s and a 383 would allow you to have your cake and eat it too. (Except the fuel economy issue).
You could also consider converting to TPI, but that has its own limitations and is quite expensive. Go with gears and stroking the engine...and buy shares in the Oil Company where you buy your gas.
#3
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Car: 2005 Subaru STI
Engine: 153ci of Turbo Power!
Transmission: 6-Speed
If you have an automatic just put in a 2800 stall converter and then you will be extremely pleased with the amount of lowend that you have.
Tim
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TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org
Tim
------------------
TRAXION's 1990 IROC-Z
Best Time = 12.244 @ 112.51mph (1.778 60' / 7.819@88.32mph in the 1/8)
All Natural. No Force. No Drugs. Stock Bottom End. Stock Body Panels.
Gunning for NA 11's after installing Hooker LT Headers and reducing weight.
-=ICON Motorsports=-
Moderator: PROM board at thirdgen.org
#4
A "new" motor? Well, IMHO I'd rather have an easy-going 350 horses from a 400 small block as opposed to wringing it out of 350 cu. in.
Have you tried various jets and advance curves on your existing 350? I think the potential is there with what you have. You may not reach 350HP, but I think you can certainly get your money's worth out of that cam and Edelbrock hardware with some tweaking!
Have you tried various jets and advance curves on your existing 350? I think the potential is there with what you have. You may not reach 350HP, but I think you can certainly get your money's worth out of that cam and Edelbrock hardware with some tweaking!
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