598 SCJ Build

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Post  derek528 on July 28th 2012, 7:02 am

richter69 wrote:mine is the TFS Blake did, I'll be honest my little 563 dont really start liking it until it gets over 7500 lol. I'm gonna make it a 588 this winter and more than double the nitrous I'm putting to it now........ it wont want to peak as high then lol.

That otta run.

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Post  derek528 on July 30th 2012, 8:23 pm

Just got it off the dyno. Had a few hiccups, but all is well. I had to use a set of dyno headers 2 inch primary/3.5 collector because my headers contacted the dyno frame. THe dyno headers were standard size port(not CJ) so I think that hurt it some. Would've liked to try some better headers but that was all that was available. There dyno is about 3-5% more conservative than most as well. With that being said would anyone be interested in guessin the hp an torque?

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Post  Barney on July 30th 2012, 8:37 pm

830-870 hpmim sure those headers helped torque a bit.
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Post  bruno on July 30th 2012, 9:38 pm

with the cam , cubes and the flow ....it should do 936 hp and 798ft lbs
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Post  c.evans on July 30th 2012, 9:40 pm

I'll go with 975 Hp and about 765 Tq.

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Post  derek528 on July 30th 2012, 9:43 pm

keep em coming

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Post  dirt_worker on July 30th 2012, 9:51 pm

where were the hp&tq peaks?

Im guessing 995hp and 815tq
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Post  derek528 on July 30th 2012, 10:16 pm

peak hp 6900, peak torque was 4800.

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598 SCJ Build  - Page 3 Empty Dyno results

Post  derek528 on July 31st 2012, 8:36 am

This was the best hp pull. I really wanted to break 1000 but It didn't happen. I'd say it would have been really close with a set of 2.125 to 2.25 stepped headers with the CJ flange. The dyno headers were blocking around .125 around the whole top of the port, I would think that hurt some power but that is speculation only.

RPM HP TQ
4500 718 838
4700 760 849
4900 798 855
5100 826 851
5300 849 842
5500 871 832
5700 896 825
5900 919 818
6100 939 809
6300 952 794
6500 963 778
6700 968 759
6900 971 739
7000 969 727

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Post  Barney on July 31st 2012, 8:57 am

Great numbers for sure.
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Post  IDT-572 on July 31st 2012, 9:23 am

Great numbers Derek.................. Cool
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Post  Lem Evans on July 31st 2012, 9:36 am

That thing should be a lot of fun Exclamation

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Post  norm on July 31st 2012, 8:29 pm

That's impressive. Good job.
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Post  derek528 on July 31st 2012, 9:37 pm

Rolled her out of the garage and started mocking everything up. That's the car, the engine, and Bubba and Carlee. Bubba put one of the headers on, he rounded a bolt off lol
598 SCJ Build  - Page 3 010-1598 SCJ Build  - Page 3 012-1598 SCJ Build  - Page 3 027

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Post  61coon on August 1st 2012, 12:04 am

Great numbers! Love the car too!
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Post  derek528 on August 1st 2012, 12:27 am

61coon wrote:Great numbers! Love the car too!

Thanks a lot.

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Post  1970 ford maverick on August 1st 2012, 1:06 am

61coon wrote: Great numbers! Love the car too!
X2, SAYS THE MAVMAN
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Post  KEVIN S on September 25th 2012, 9:56 pm

Ever make any hits with this setup?

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Post  68galaxie on October 1st 2012, 8:32 pm

Fantastic results!
You were certainly correct - your cylinder head guy knows what he is doing.
Good flow numbers too Smile

Good looking Mustang.

Should be well into the 8's

Cheers

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Post  derek528 on October 2nd 2012, 8:33 pm

KEVIN S wrote:Ever make any hits with this setup?

Haven't made any yet. Still finishing up the car.

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Post  theredcar on December 23rd 2012, 6:00 pm

great combo we went 4.88 at 3100 ss mustang a few years back , built same motor in a backhalf car went 430s in the 1/8 its a very good combo

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Post  460bronco on June 18th 2013, 8:01 am

Have you gotten to the track yet???
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Post  Lem Evans on June 21st 2013, 7:10 pm

derek528 wrote:The short block is now assembled. Cam is in, it's 3.5 degrees advanced. Next weekend we will assemble the heads. Pushrod lengths ended up at 9.050 intake, and 9.150 exh. Geometry looks good with the crane gold wide body rockers, we ended up with .830 gross valve lift, when measured off the retainer.  
I did get some flow numbers. They ran the same cnc program on another set of heads. The customer decided to have them flowed. The only difference is that my heads have a 2.25 valve and the ones they flowed use the original 2.20 valve.

I don't have all the numbers, but the heads flowed 377 at .500, and 403 at .800 w/ 2.20 valves. I don't know what mine flow with the 2.25 valve, I'd guess slightly more. The exh ports were less impressive at 220 cfm without a test pipe. The bowls are pretty big on the exhaust, that hurts the flow numbers when not using a pipe, and they didn't have a test pipe handy to use for the test.

All in all I'm very pleased with the headwork, I think it's going to make pretty decent power.

I see you are at .830" gross lift on the intake side....so, you did not use the 281*/.470" lobe?

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Post  derek528 on June 23rd 2013, 7:14 pm

460bronco wrote:Have you gotten to the track yet???

No. The composite head gaskets were not up to the task. They seeped in the cylinders while it sat and the rings stuck in the pistons. Engine is torn apart now.

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Post  derek528 on June 23rd 2013, 7:15 pm

Lem Evans wrote:
derek528 wrote:The short block is now assembled. Cam is in, it's 3.5 degrees advanced. Next weekend we will assemble the heads. Pushrod lengths ended up at 9.050 intake, and 9.150 exh. Geometry looks good with the crane gold wide body rockers, we ended up with .830 gross valve lift, when measured off the retainer.  
I did get some flow numbers. They ran the same cnc program on another set of heads. The customer decided to have them flowed. The only difference is that my heads have a 2.25 valve and the ones they flowed use the original 2.20 valve.

I don't have all the numbers, but the heads flowed 377 at .500, and 403 at .800 w/ 2.20 valves. I don't know what mine flow with the 2.25 valve, I'd guess slightly more. The exh ports were less impressive at 220 cfm without a test pipe. The bowls are pretty big on the exhaust, that hurts the flow numbers when not using a pipe, and they didn't have a test pipe handy to use for the test.

All in all I'm very pleased with the headwork, I think it's going to make pretty decent power.

I see you are at .830" gross lift on the intake side....so, you did not use the 281*/.470" lobe?

Yes sir.

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