mshred
The Green Manalishi
- Joined
- May 2, 2008
- Messages
- 3,242
- Reaction score
- 130
Hey guys,
my dad finally found the build sheet for his 340 (will be my motor)...It has been bored .30 over with forged sealed pro pistons, 10.5:1 compression ratio, crank journals turned down .20". The cam is a comp grind (very old part # CRS 280H-10) that specs out with a gross valve lift of .480 int/exh, with a duration at .06 tappet lift of 280 int/exh with lsa of 110 degrees (its a high energy model but not sure as to what type of cam). I planned on runing this motor with heddman 1-5/8 inch headers, into a 3 inch x pipe exhaust with either borla xr-1 or dynomax ultraflow mufflers dumped at the axle. The heads are stock x heads with aftermarket valvesprings added, and they are slightly home ported by my dad...with a thermoquad, and open 2.76 8-3/4, and 727 manual vb with stock converter my dad ran 14.2 with this motor in a 78 aspen... So i have a few questions if you guys dont mind helping me- im very interested to hear your opinions
first off, what intake manifold and carb do you guys recommend? I was thinking rpm performer air gap or an M1 single plane, but not sure about carb...i think 650 would be good (this car will be seeing the street 95% of the time), but was thinking of maybe using the Holley 3310 (750 VS carb) since it will be mainly a street car (my only concern is that my car is stick and may suffer from VS limitations when shifting gears??)
Second, what do you guys think the car will run in the 1/4? It is minitubbed, with a 28x12 inch street/strip tire, 3.91 suregrip rearend, t5 manual tranny with 3.35 first gear (giving me an overal first gear ratio of 13.1), pinion snubber, either SS springs or stiffened factory springs, slant six t bars, no ac...I figure the car will weigh in around 3300-3500 hundred pounds...Will have the above mentioned motor, with some combination of intake and carb as well (decided by your help)...any projected outputs for it? I think it should run around a 13.2...does that sound optimistic? pessimistic? interested to hear what you guys have to say
this car will be my daily driver (I know she's gonna be a pig on gas) with track outings only a couple of times a year- however, performance on the street is very important for me, dont ask why...any recommendations you guys have or any info that im leaving out for you guys to help me let me know
thanks
Matthew:thumbup:
my dad finally found the build sheet for his 340 (will be my motor)...It has been bored .30 over with forged sealed pro pistons, 10.5:1 compression ratio, crank journals turned down .20". The cam is a comp grind (very old part # CRS 280H-10) that specs out with a gross valve lift of .480 int/exh, with a duration at .06 tappet lift of 280 int/exh with lsa of 110 degrees (its a high energy model but not sure as to what type of cam). I planned on runing this motor with heddman 1-5/8 inch headers, into a 3 inch x pipe exhaust with either borla xr-1 or dynomax ultraflow mufflers dumped at the axle. The heads are stock x heads with aftermarket valvesprings added, and they are slightly home ported by my dad...with a thermoquad, and open 2.76 8-3/4, and 727 manual vb with stock converter my dad ran 14.2 with this motor in a 78 aspen... So i have a few questions if you guys dont mind helping me- im very interested to hear your opinions
first off, what intake manifold and carb do you guys recommend? I was thinking rpm performer air gap or an M1 single plane, but not sure about carb...i think 650 would be good (this car will be seeing the street 95% of the time), but was thinking of maybe using the Holley 3310 (750 VS carb) since it will be mainly a street car (my only concern is that my car is stick and may suffer from VS limitations when shifting gears??)
Second, what do you guys think the car will run in the 1/4? It is minitubbed, with a 28x12 inch street/strip tire, 3.91 suregrip rearend, t5 manual tranny with 3.35 first gear (giving me an overal first gear ratio of 13.1), pinion snubber, either SS springs or stiffened factory springs, slant six t bars, no ac...I figure the car will weigh in around 3300-3500 hundred pounds...Will have the above mentioned motor, with some combination of intake and carb as well (decided by your help)...any projected outputs for it? I think it should run around a 13.2...does that sound optimistic? pessimistic? interested to hear what you guys have to say
this car will be my daily driver (I know she's gonna be a pig on gas) with track outings only a couple of times a year- however, performance on the street is very important for me, dont ask why...any recommendations you guys have or any info that im leaving out for you guys to help me let me know
thanks
Matthew:thumbup: