C409

….. Dyno Sheet …
421 sbc 4.157 x 3.875
Brodix 227 CNC heads
Custom Cam by Mike Jones 261/266 108* .699/.660
JE Flattops 11.2:1 compression
….. Dyno session cut short by dyno fuel flow meter failure (E-85 ?) .....
..... Thanks Will ! ... ...

bjankuski

Nice numbers, what are the airflow numbers for the brodix 227 heads.

cardo0

Nice and wide power band and congratulations! Have to wonder if a vacuum pump could add some top end power to a high RPM motor like yours. Have you considered a vacuum pump for ring seal, ring flutter and blowby?

dizwiz24

Pwnage1337

Dart block?

C409

.............................0.200 … 0.300 … 0.400 … 0.500 … 0.600 … 0.650 ... 0.700 .....
….. 2.080 in ……...... 154 ..... 223 ........ 270 ...... 303 ...... 312 ........ 314 ..... 316 .....
….. 1.600 ex ......... 116 ..... 150 ........ 185 ...... 208 ...... 219 ........ 224 ..... 227 .....

..... I thought the heads would bottleneck it but it turns out that the intake is choking the little guy ... not too surprising considering that I kept it under the stock hood ! ... Edelbrock Victor E ported by Eric Weingartner and an Accufab 4bbl throttle body that supposedly flows 1200 cfm ... Vacuum during the pull went from 1.05" to 1.76" @ 7000 rpm ..... from 99kpa to 95kpa ..... We were just starting to tune it when the fuel flow meter on the dyno started putting out some strange readings ... I had a WBO2S in but it was primarily reading the #8 cylinder because of where the bung was located on the dyno headers ..... There was likely 10-15hp left on the table when we quit making pulls .....

C409

..... Thanks ! ... I bracket race ... this is not a max effort , squeeze every last pony out of it deal ... and I spend all my money keeping this rig going , so there's no extra $ for extravagance ... I personally do not consider 7000 rpm to be a high rpm motor .....

C409

..... Little M with steel main caps .....

rklessdriver

Looks solid.

I wish you would have been able to really tune on it.
Will

C409

..... Me Too ! … the BSFC curve was the same shape but the #'s dropped to 0.17-0.18 with fuel flow showing 80's gph - 120 gph … and the power curve was the same (or very close) to the dyno sheet in post #1 … Its a Miracle ! … Thanks for your help ! …..

C409

….. AND … I run a full exhaust system … the car is tagged , registered , and insured for street use … we get out now and again to put smiles on the faces of motorheads and kids …..

blackozvet

nice, was that engine dyno or in the car ?

C409

….. Engine Dyno … Those would be awesome numbers at the rear wheels ! …..

383vett

Looks nice!

bjankuski

I assume the cam is a solid roller? What lifters are you running?

C409

..... Comp Cams Small Base Circle lifters # 891 … Had them rebuilt by Comp … new axles , rollers , and needles - and OD polished for around $13ea …..

C409

….. Engine and trans are back in the car … now to get it all hooked up and out to the track for the fine tuning ! …..

BLWN1

Still available