400" miniram low rpm street motor dyno
10-19-2017, 01:56 PM
#1
400" miniram low rpm street motor dyno
Guys are always worried about giving up low end torque. Especially when talking about going to a short intake runner intake like miniram. But not always the case.
Heres a marine motor thats going into a boat but basic build can be used on the street just fine and last forever. Insane torque curve. 475 hp by 5500 rpm. 91 oct gas. 500 lb ft torque.
They loaded this motor down wot at 2000 rpm and it was registering 380 lb feet.
Its over 450 lb ft from 3300 to 5500 basically. Huge flat curve.
Motor is lower compression 400" sbc with brodix 200 cc heads and a smaller 218 deg at .050 hyd roller. Tpis miniram. No other details but figured i'd share. Throttles performance did the build
Heres a marine motor thats going into a boat but basic build can be used on the street just fine and last forever. Insane torque curve. 475 hp by 5500 rpm. 91 oct gas. 500 lb ft torque.
They loaded this motor down wot at 2000 rpm and it was registering 380 lb feet.
Its over 450 lb ft from 3300 to 5500 basically. Huge flat curve.
Motor is lower compression 400" sbc with brodix 200 cc heads and a smaller 218 deg at .050 hyd roller. Tpis miniram. No other details but figured i'd share. Throttles performance did the build
10-19-2017, 04:41 PM
#2
Re: 400" miniram low rpm street motor dyno
Gives me encouragement on my future 427 sbc build... That engine must idle silky smooth with that cam in a 400 cid engine.
My goal is ~500-520 hp, with smooth idle and very good street manners (basically a very stealthy 500 hp). So probably a cam around 224° @.050 would probably get me there.
My goal is ~500-520 hp, with smooth idle and very good street manners (basically a very stealthy 500 hp). So probably a cam around 224° @.050 would probably get me there.
10-19-2017, 07:55 PM
#4
Supreme Member
iTrader: (8)
Join Date: Oct 2001
Location: Il
Posts: 11,686
Received 745 Likes
on
505 Posts
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 400" miniram low rpm street motor dyno
I really need to tune mine and dyno it.
10-20-2017, 07:33 PM
#5
Re: 400" miniram low rpm street motor dyno
Now, if 600 was the goal, it'd be a different story... I think even a 427 sbc would get a little rambunctious to make that kind of power... streetability would probably suffer (at least the way I define streetability anyway)
10-21-2017, 07:03 AM
#7
TGO Supporter/Moderator
iTrader: (12)
Join Date: Jul 1999
Location: SALEM, NH
Posts: 11,720
Likes: 0
Received 89 Likes
on
75 Posts
Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, 355" LT1, LT1
Transmission: T5, Zf6, 4L60E
Axle/Gears: 3.42, Dana44 3.45, 3.23
Re: 400" miniram low rpm street motor dyno
Guys are always worried about giving up low end torque. Especially when talking about going to a short intake runner intake like miniram. But not always the case.
Heres a marine motor thats going into a boat but basic build can be used on the street just fine and last forever. Insane torque curve. 475 hp by 5500 rpm. 91 oct gas. 500 lb ft torque.
They loaded this motor down wot at 2000 rpm and it was registering 380 lb feet.
Its over 450 lb ft from 3300 to 5500 basically. Huge flat curve.
Motor is lower compression 400" sbc with brodix 200 cc heads and a smaller 218 deg at .050 hyd roller. Tpis miniram. No other details but figured i'd share. Throttles performance did the build
Heres a marine motor thats going into a boat but basic build can be used on the street just fine and last forever. Insane torque curve. 475 hp by 5500 rpm. 91 oct gas. 500 lb ft torque.
They loaded this motor down wot at 2000 rpm and it was registering 380 lb feet.
Its over 450 lb ft from 3300 to 5500 basically. Huge flat curve.
Motor is lower compression 400" sbc with brodix 200 cc heads and a smaller 218 deg at .050 hyd roller. Tpis miniram. No other details but figured i'd share. Throttles performance did the build
-- Joe
