Krooser
11-21-2020, 05:03 AM
Okay... in a couple weeks I'll be assembling the carb I will be using next season on my DLM. 388ci, iron block and heads, flat tappet, alky fuel, heads flow 294intake @ .600, T&D rockers, MSD ign and dizzy.
This is an ex-WISSOTA mod engine that had 575HP it it's original livery but I'm hoping the extra cubes, lighter valve train and improved carb should get me to 650HP. I plan on doing a bit of bowl work on the heads just to help flow around the guides... and maybe open up the intake ports a smidge as suggested by a reputable local shop.
The engine originally had a 750 Braswell carb... an alky conversion from gas (mid 90's deal). Last fall I bought another used Braswell but an 850cfm deal. Sold the 750.
Just looking around online Holley sez I need a 950XP for my 388 to run right at 72-7500rpm. I don't really question their suggestion but most of my buddies are still telling me they run a 750 on their 360-390 cube engines. Funny how they are always selling an 850 to "improve" their program but still insist they run 750's!
I've talked to a few aftermarket builders and they are all over the place from 750 to 830 to a 750 with an 850 baseplate to a full bore 950 that they claim on produces 850.
I do my own carb work... have been since the 60's. No offence to the boutique builders. If I buy a $900.00 carb I'd like it to be spot on out of the box. Dyno results will tell me quite a bit, too.
Ideas?
This is an ex-WISSOTA mod engine that had 575HP it it's original livery but I'm hoping the extra cubes, lighter valve train and improved carb should get me to 650HP. I plan on doing a bit of bowl work on the heads just to help flow around the guides... and maybe open up the intake ports a smidge as suggested by a reputable local shop.
The engine originally had a 750 Braswell carb... an alky conversion from gas (mid 90's deal). Last fall I bought another used Braswell but an 850cfm deal. Sold the 750.
Just looking around online Holley sez I need a 950XP for my 388 to run right at 72-7500rpm. I don't really question their suggestion but most of my buddies are still telling me they run a 750 on their 360-390 cube engines. Funny how they are always selling an 850 to "improve" their program but still insist they run 750's!
I've talked to a few aftermarket builders and they are all over the place from 750 to 830 to a 750 with an 850 baseplate to a full bore 950 that they claim on produces 850.
I do my own carb work... have been since the 60's. No offence to the boutique builders. If I buy a $900.00 carb I'd like it to be spot on out of the box. Dyno results will tell me quite a bit, too.
Ideas?