Re: 598 SCJ Build

Lem Evans June 23rd 2013, 7:19 pm

derek528 wrote:
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.

Are you going to cometic?

derek528 June 23rd 2013, 9:36 pm

Lem Evans wrote:
derek528 wrote:
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.

Are you going to cometic?

yes sir

460bronco June 30th 2013, 8:19 pm

Great numbers, but I didn't realize this at first... Why such a wide spread between peak torque and peak horse power?? The peak torque was around 4800 and the peak horse power was around 6900. Thats a 2100RPM spread. What part of the combo has the biggest part to play in this wide spread? Does it mean there is still more to be had out of the combo with some changes???

IDT-572 June 30th 2013, 8:43 pm

High airflow and a smallish cross section in the head for the cubic inch of the engine. It takes a good port to flow quality air and quantity.

It has the ability with the high air speed to fill the cylinders efficiently in the lower rpm range and also in the upper.

My tfs headed 557 did this too............. It had a 1700 rpm spread.

Gary Blair January 24th 2014, 3:39 pm

derek528 wrote:
61coon wrote:Great numbers! Love the car too!

Thanks a lot.

Nice build Derek. Nice work on the manifold.

Gary Blair January 24th 2014, 3:44 pm

IDT-572 wrote:High airflow and a smallish cross section in the head for the cubic inch of the engine. It takes a good port to flow quality air and quantity.

It has the ability with the high air speed to fill the cylinders efficiently in the lower rpm range and also in the upper.

My tfs headed 557 did this too............. It had a 1700 rpm spread.

Nice work on Jon's manifold Blake. You showed me your Victor on the motor in Columbus awhile ago. Look's like Jon's might have a littel more plenum?

butterbean July 14th 2015, 1:04 pm

Derek, any up dates??? I got a lead on a 611 CI with Iron Blue Thunder heads with scj exhaust ports, and I may want to use my SCJ's on it

Jetman August 12th 2015, 7:30 pm

Nice build. The car looks like it will move.

IDT-572 May 4th 2016, 3:04 pm

Anybody ever hear what this engine made for power?

68formalGT May 4th 2016, 3:17 pm

Has this been run in a car yet, if so what kind of times did you run?

derek528 wrote: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

IDT-572 wrote:Anybody ever hear what this engine made for power?

IDT-572 May 4th 2016, 3:20 pm

What intake did you have on it? Your going to have to move that tq peak RPM on up higher to get to the EL GRANDO. By the looks of the dyno sheet, it probably possible with some header and intake work.

IDT-572 May 4th 2016, 3:22 pm

Crap, should have looked back at the post. Intake should be there it looks good.

Gary Blair December 16th 2016, 6:07 pm

derek528 wrote: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

Good power. Did you knock the short turn down on the intake side? Did you ever get the head flowed?

Gary Blair December 16th 2016, 6:54 pm

derek528 wrote:
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.

Derek, What heads gaskets did you use?

jbozzelle December 17th 2016, 1:39 pm

This guy hasn't logged in since April of 2015. But I think this he is still on here but with a different username. Not 100% sure though.

I'm curious what ET the combo did in the Mustang...

Gary Blair December 18th 2016, 9:10 am

jbozzelle wrote:This guy hasn't logged in since April of 2015. But I think this he is still on here but with a different username. Not 100% sure though.

I'm curious what ET the combo did in the Mustang...

Oops missed that. I was wondering about the ET as well.

derek528 May 7th 2017, 12:04 pm

I'm putting this up for sale. Dyno time only. I never took it to the track. I'm looking for 15,000 for it. Call or text 5134766905 if you're interested.

holeshot May 10th 2017, 11:52 am

Interested in 598 . I read the thread very nice and great numbers . Does the 598 come carb to pan ? Look's like it is set up for a fox body . A couple questions ! Who was the engine builder ? also what is your location and would you ship ? Thank's

derek528 May 10th 2017, 4:52 pm

holeshot wrote:Interested in 598 . I read the thread very nice and great numbers . Does the 598 come carb to pan ? Look's like it is set up for a fox body . A couple questions ! Who was the engine builder ? also what is your location and would you ship ? Thank's

Carb to pan. It's a fox body pan. My brother built it he is an employee at bed. I'm in Hamilton Ohio. I would ship at buyers expense.

BBFTorino June 23rd 2017, 4:57 am

I wonder how much more power this engine would make with an A460 or C460 top end!!

rmcomprandy June 23rd 2017, 9:27 am

derek528 wrote:There is so much experience in the shop that there really is no need to flow them. They know what makes power...and it's not flow numbers. For example, laying back the short turn really flat will sometimes kill flow numbers, but almost always picks up power. To me, a flow bench is a tool that has it's place, but the dyno tells the true story. I may be wrong and this thing might be a pig, but I doubt it. It will be dynoed, on a conservative dyno and I'll post the numbers. Bischoff does have a flow bench, which gets used from time to time, but bischoff does not build winning engines based on flow numbers. I have brought up flowing these heads and all the guys in the shop just laugh and say "You need to stop racing the flow bench"

Just for everyone reading ... Laying back the short side on the cylinder wall side is very testy with an SCJ head from FRPP; gets thin and very close to water and every port thickness is different. Bulging that side wall out behind the pushrod pinch though, helps everywhere.

Getting 2" of intake installed height normally requires changing the intake rocker stud angle or a Jesel.

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