[CNC BLOCKS N/E]

Spent Friday on the dyno testing 421 pump gas build for a customer, He was looking for a 600 horse pump gas build and we achieved our goals with this build. Torque was very impressive @ 574 FT LBS. Tried to build this with all shelf stock parts so it so it could be duplicated. The good thing this is just a street car and only needed to turn this engine 6400 to make peak power.

Little about the build

Dart SHP block 4.155 bore
Callies 3.875 D/S crank
Callies 6 inch rods
Mahle pistons
Clevite V bearings
Steffs custom aluminum pan
Bullet S/R roller cam 1.000 base circle cam
.904 Morel lifters
AFR heads 220/75cc chambers ( Thanks Tony Mamo )
061040 World intake
Pro Systems carb
MSD Distributor
ATI balancer
Crower SS rockers 1.5
Mellings 10552 pump

 

[Monte442]

Congrats, nice job Carl.

 

[drl650]

Very nice, That is about where my pump gas 434 was, Nice numbers.

 

[Iforgot]

that is one sweet small block! the really sweet part is it's just the CORRECT combo of off the shelf parts..nice!

 

[Indiansprings]

Great job, That's a killer small block. Someone will be very happy with that mouse.

 

[AJS]

Mighty mouse would be proud. Sweet engine. Those are crower stainless steel shaft rockers?

 

[540Hotrod]

Looks like a good one Carl! Can you share ballpark cam specs?

You could go into the 'serious" crate engine business!


JIM

 

[forcd ind]

most street engines live below 3600 RPM's, so I never get to excited about max power, more about idle vac. and torq in the driving range, but dynos don't seem to produce #'s down low
good #'s though

 

[CNC BLOCKS N/E]

most street engines live below 3600 RPM's, so I never get to excited about max power, more about idle vac. and torq in the driving range, but dynos don't seem to produce #'s down low
good #'s though

By a GM stock crate engine lie a target master you should be fine.

This exactly what the customer wanted and he is very happy with a 6 speed and 4:11 in the rear he can run what ever he wants for RPM.

I have built a lot of street and strip engines that build peak torque over 3600 and so far no complaints.

 

[CNC BLOCKS N/E]

Looks like a good one Carl! Can you share ballpark cam specs?

You could go into the 'serious" crate engine business!


JIM

259/263 SR 108 Lobe sep .626 lift.

I get a few of these engines a year to do and that's enough for me, I have a lot of circle track engines and block work that keeps me pretty busy LOL.

 

[CNC BLOCKS N/E]

Mighty mouse would be proud. Sweet engine. Those are crower stainless steel shaft rockers?

Stud mount rockers that's what he had brand new. If he would have bought the shafts I would have gone to a 227 Dart or AFR head.

All in all it came out as planned it did not need a lot of RPM to make peak power with this set up.

 

[71350SS]

:thumbsup: Thats a nice street motor just waiting for its turn at the track.

 

[CNC BLOCKS N/E]

:thumbsup: Thats a nice street motor just waiting for its turn at the track.

I doubt this would ever see any track time, If the customer did not already have the stud mount Crower rockers I would have gone with the 227 Dart or AFR heads and made some real power. LOL

For only needing 6400 RPM for peak power its a great street build and should last a long time.

 

[540Hotrod]

most street engines live below 3600 RPM's, so I never get to excited about max power, more about idle vac. and torq in the driving range, but dynos don't seem to produce #'s down low
good #'s though

I never quite understand these type comments. Yes...when street driving most street engines stay well under 4000 RPM.

But what does that have to do with power? That's at part throttle operation-cruise mode. That's a driveability issue..not a power issue. What would a number at WOT and 2000 RPM mean to anyone *(plus few dyno's can hold a high power motor down in that range)? If you go WOT at 2000 RPM you're going to be through that in about a nano-second with any sort of converter,trans combo...and if you've got a stick trans hopefully folks will drop out of high gear when trying to do it.

"Torque in the driving range" is again a part throttle deal unless you're talking about towing a trailer up a mountain with your foot stuffed in it. You can drive around all day and never use 50-100 HP.

I'm not trying to be a jerk...I understand what you're saying. I drive rental cars regularly while traveling for work, and the driveability new stuff achieves with V-6's and turbo'd 4's is amazing to me. I had a Ford Eco Boost the other day that was great....and the 305HP V6 Mustangs do good on a 50 MPH roll. Heck even Chrysler 300's drive great. They are incredibly smooth and torquey at low RPM...and when you smack them they have a very fat torque curve...but they rev to 5000-7000 rpm for the max TQ/HP ranges and shift pretty high.

JIM

 

[blasttime]

Nice thanks for sharing

 

[Munch69ProTour]

interested...

 

[JOHN WILSON]

That'll make a nice street piece! :yes: Nice job, Carl! :beers:

 

[aukai]

Hey Carl that's pretty nifty.

 

[CNC BLOCKS N/E]

Thanks for all the positive compliments.

 

[Wolfplace]

I never quite understand these type comments. Yes...when street driving most street engines stay well under 4000 RPM.

But what does that have to do with power? That's at part throttle operation-cruise mode. That's a driveability issue..not a power issue. What would a number at WOT and 2000 RPM mean to anyone *(plus few dyno's can hold a high power motor down in that range)? If you go WOT at 2000 RPM you're going to be through that in about a nano-second with any sort of converter,trans combo...and if you've got a stick trans hopefully folks will drop out of high gear when trying to do it.

"Torque in the driving range" is again a part throttle deal unless you're talking about towing a trailer up a mountain with your foot stuffed in it. You can drive around all day and never use 50-100 HP.

I'm not trying to be a jerk...I understand what you're saying. I drive rental cars regularly while traveling for work, and the driveability new stuff achieves with V-6's and turbo'd 4's is amazing to me. I had a Ford Eco Boost the other day that was great....and the 305HP V6 Mustangs do good on a 50 MPH roll. Heck even Chrysler 300's drive great. They are incredibly smooth and torquey at low RPM...and when you smack them they have a very fat torque curve...but they rev to 5000-7000 rpm for the max TQ/HP ranges and shift pretty high.

JIM

Very very well stated :beers:

If someone really wanted to know what the torque below these numbers were it would be a totally different "dyno pull"
Or a diesel,,,

We commonly do these "tests" if you want to call them that to break a milder engine like this in by cycling it between two setpoints at a part throttle setting with enough throttle to get it to load to 80-100% of the dyno's capability from say 2000-2500 to 3500 or so for 15-20 minutes

If it isn't happy down there it will show up real quick but has little to to do with what is going on at full tilt

There is a reason God gave us a shift lever,,,or for us lazy type folks,,, transmissions that downshift,,,,,,

Nice build Carl, someone is going to be pretty happy with his toy,,,,