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97 tj 4.6l stroker.

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Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 11:51 am

Hey guys, been lurking for a while since the idea of a stroker got in my head. It took almost a year to gather info/parts and get the motor built. Now its in my jeep and i want to tune the ecm,fine tune plug heat range and find out what a reasonable expectation for octane is with my combo. Basically get her running tip top.

Heres my parts list:
-96 zj block
-Scat 4.2l crank and rods
-Russ's 18cc forged pistons .030 over,chevy floating pins
- .040 thick 3.990 bore mls head gasket
-Edelbrock head w/57cc smoothed chambers/ports. Stock valve sizes.
-Comp cam 231 russ spec'd.nitrided
-99 intake and 24lb injectors
-throttle body with step behind blade removed
-Banks header
-centerforce heavyweight flywheel(manual trans)
-Stock exhaust and intake for now

All other parts are stock for now.

Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 11:59 am

If the calculator is correct then i have 10.2 static compression and 8.57 dynamic. I was told by russ he would spec me pistons i could run on 87 octane with an eddy cylinder head

Does this seem a bit high to you guys for 87 octane?

I guess i could go with ls valves and more chamber work to lower compression if need be?

I just broke in the cam last night and drove it 30 miles varying speed, rpm and throttle with a few full throttle runs for the rings.
Temp is rock solid an oil pressure around 40 psi

A little valve train noise but hopefully that will go away

Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 12:05 pm

It did have some rattle lugging it with too much throttle but pulls great down low just like i wanted.hills are no longer a problem!!

Spark plugs are stock champion rc12lyc but edelbrock recommends rc12yc for that head?

So heres what I'd really like to know. Will a tune and colder plugs stop the rattle? Or do i need to pull the head and get russ to work his magic with LS valves and larger chambers.

Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 12:13 pm

I will be getting a hptuners compatible wideband very soon and a tuner to tweak it for me. Flyn ryan flat out said he won't tune our strokers on 87 octane. That and the rattle has me a little worried I'm missing something?

I want to be able to run this on 87 and lug it down wheeling my lifted and locked tj in the summer.

Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 12:23 pm

A couple pics
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Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 20th, 2020, 12:24 pm

Motor
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jsawduste
My keyboard is getting warn out
My keyboard is getting warn out
Posts: 1023
Joined: February 28th, 2008, 3:13 am
Stroker Displacement: 4.9
Location: Michigan

Re: 97 tj 4.6l stroker.

Post by jsawduste » November 20th, 2020, 11:12 pm

You wont pay a few cents a gallon for higher octane fuel but are willing to take it all apart and incur the expense of lowering the compression ratio ? Plus cheating yourself out of the reliability a good tune will provide ?

Rickyd
Posts: 9
Joined: February 6th, 2020, 7:15 pm
Vehicle Year: 1997
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: 97 tj 4.6l stroker.

Post by Rickyd » November 21st, 2020, 7:04 am

Some places only have 87(like death valley).that is how i want this build to go.

As far as a tune it will get one.but not from ryan apparently.

As far as the head removal thats easy.

You didn't address my questions about stopping knock and the compression ratio for 87.

jsawduste
My keyboard is getting warn out
My keyboard is getting warn out
Posts: 1023
Joined: February 28th, 2008, 3:13 am
Stroker Displacement: 4.9
Location: Michigan

Re: 97 tj 4.6l stroker.

Post by jsawduste » November 21st, 2020, 2:33 pm

Not going to address it.

You had the engine speced/parts supplied through a reliable builder, talk to them.

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