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Over the last few years I've added a few bolt on parts and put the truck on the dyno and ...



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Old 10-23-2012, 06:43 PM
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Dyno Runs

Over the last few years I've added a few bolt on parts and put the truck on the dyno and these are the results.

Dyno Jet- Elevation 3300 ft.- Temp 80-26.78 in-Hg- Humidity 19
Temp 79-26.93 in-Hg- Humidity 31
Temp 67-28.43 in-Hg- Humidity 47

Stock:

1st run: 426.0 rwhp/ 443.8 torq.
2nd run: 429.3 rwhp/ 464.5 torq.
3rd run: 440.2 rwhp/ 491.5 torq. with a tune

Added a BBK from JTS and CAI from JBM and MagnaFlow W/ stock cats.

1st run: 434.41 rwhp/ 474.54 torq.
2nd run: 446.00 rwhp/ 485.46 torq.

Added JMB Midpipes W/ High Flow cats.

1st run: 447.13 rwhp/ 485.89 torq.
2nd run: 454.95 rwhp/ 492.19 torq.

After spunning a rod bearing this summer I decided to forge the motor and put in the 710 cam. Only to make the motor stronger or ready for a S/C someday. Just the sound of the 710 cam was worth all my trouble, well all most.

The dyno run was the 4th run with a heat soaked motor.

4th run: 493.09 rwhp/ 494.90 torq.

Sean said I need to free up my 2 1/2 bottlenext in my JMB Midpipes and MagnaFlow exhaust and my stock manifolds are holding back HP. But still the truck really pulls on top end.

I can e-mail the dyno sheet to anyone that can post it for me.

Thanks
NVR2OLD

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Old 10-23-2012, 07:54 PM
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hmmm... Didn't know this section was moderated, I'll do better
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Old 10-23-2012, 08:06 PM
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Nice, any head work or higher compression? Is love to see the dyno sheet
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Old 10-23-2012, 08:08 PM
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Nice numbers....

I can vouch for the 710 cam it does sound good!
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Old 10-23-2012, 08:47 PM
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At what power level does Sean think a 2.5" exh. becomes a bottle neck on these engines?
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Old 10-23-2012, 09:23 PM
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Originally Posted by SergioL. View Post
At what power level does Sean think a 2.5" exh. becomes a bottle neck on these engines?
Stock! I have a custom true dual equal length X-pipe Twin Borla race mufflers catless exhaust, that I gained 35 ftlbs over the race cats and Magnaflow. My engine is pure stock internally (block, heads , cam, compression).....my mods include ported intake, JTS Venom TB, full length headers, underdrive pulley and a Chris Jensen tune. I'm at 510 rwhp and 541 ftlbs on a Dynojet spinning the stock 22's with 325-40-22 tires.
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Old 10-24-2012, 10:33 AM
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Quote:
Originally Posted by ARRESTmeRed04 View Post
Nice, any head work or higher compression? Is love to see the dyno sheet
The 710 cam does like more compression and would help the HP alot, but we only have 91 octane here. I had a friend clean up the heads, but not ported.
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Old 10-24-2012, 10:37 AM
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Quote:
Originally Posted by NVR2OLD View Post
Over the last few years I've added a few bolt on parts and put the truck on the dyno and these are the results.

Dyno Jet- Elevation 3300 ft.- Temp 80-26.78 in-Hg- Humidity 19
Temp 79-26.93 in-Hg- Humidity 31
Temp 67-28.43 in-Hg- Humidity 47

Stock:

1st run: 426.0 rwhp/ 443.8 torq.
2nd run: 429.3 rwhp/ 464.5 torq.
3rd run: 440.2 rwhp/ 491.5 torq. with a tune

Added a BBK from JTS and CAI from JBM and MagnaFlow W/ stock cats.

1st run: 434.41 rwhp/ 474.54 torq.
2nd run: 446.00 rwhp/ 485.46 torq.

Added JMB Midpipes W/ High Flow cats.

1st run: 447.13 rwhp/ 485.89 torq.
2nd run: 454.95 rwhp/ 492.19 torq.

After spunning a rod bearing this summer I decided to forge the motor and put in the 710 cam. Only to make the motor stronger or ready for a S/C someday. Just the sound of the 710 cam was worth all my trouble, well all most.

The dyno run was the 4th run with a heat soaked motor.

4th run: 493.09 rwhp/ 494.90 torq.

Sean said I need to free up my 2 1/2 bottlenext in my JMB Midpipes and MagnaFlow exhaust and my stock manifolds are holding back HP. But still the truck really pulls on top end.

I can e-mail the dyno sheet to anyone that can post it for me.

Thanks
NVR2OLD
Your gains with the changes listed, look completely normal.

The "710" performance camshaft has a late(r) closing intake so it will reduce low r.p.m. cylinder pressure until it phases at a higher r.p.m. and produces the top-end pull you are describing.. You could create more useable torque for your truck by increasing the compression ratio and/or advancing the camshaft.
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Old 10-24-2012, 10:38 AM
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Originally Posted by SergioL. View Post
At what power level does Sean think a 2.5" exh. becomes a bottle neck on these engines?
I don't know! Sean said this cam loves timing and a free flowing exhaust.
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Old 10-24-2012, 11:04 AM
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I also e-mailed the dyno comparison sheet to ARRESTmeRed04 to post for me. Thanks Justin!

You will see the 710 cam lost some torque down low but I feel it really didn't hurt the truck that much and it makes it up big time on the top end.
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