Looks good hopefully you notice a difference at the track.

 

I would also take care if those fins at the throttle body opening. I've read you can open that up to 90 mm so you don't need an adaptor to run that size tb.


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Yep definitely take those fins out.

Also looks good! I dont think you took out too much. I've seen more stripped away. Did you think about port matching? That'd be the most ideal.

I will be doing this here soon as I get the garage cleaned and can pull the intake off the boss.

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Thanks. Yeah I'll be taking the fins out too. The plan over the winter is to port the throttle entrance to 90mm, then make a 4.5" cold air intake. I would do it now, but since a 90mm TB is $600+ I can't swing it at the moment.

As far as port matching, Shaun at AED said don't take out to much. He's actually seen people lose power. I may take out some more. I want to grab some 400 grit then 1000 grit sand paper to smooth it out more before polish.

 

Ahhh interesting on the loosing power part. I guess I better ask him as well first since the boss is a little different.

All this work and you might as well have gotten a cobra jet intake and TB.

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Looks good.

Is the trans back in the car?

 

Thanks! And yea it is.... But I never dropped it lol. It's been all set since Friday but worked a lot, didn't have time. It's coming out today.

I might need to take a trip to the dealer to grab some stepped dowel pins too.

 

Lol! I'm not sold on the CJ just yet. I may make the switch depending where I'm at ET/mph wise. If I can go 10.999 @ 125.00mph... I'll be more then happy

 

Fair enough. That will be nice if you get into the 10s. I'm excited to see your car run soon as you have it all back together. I expect some beastlyness out of you

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Lol! Same man, I can't wait.

I decided to pick up some 360/600/1200 grit sand paper, smooth it out more before I polish. Also taking more off the injector boss. I'll post pics in a few

 

Hey,

Im thinking about doing this as well during the winter since the car will be sitting. Can you take a picture of the sanding of the fins of the throttle body I want to use the stock TB.

 

Sure thing, didn't start that yet. I was working on finishing one side of the runners and dropping my trans. This is pretty much final product.

Carbide tipped cutter to blend plastics
120 grit sand paper drum to trim as much of the injector boss and triangular corner pieces until they are smooth
360 grit sand paper (by hand)
600 grit sand paper (by hand)
1200 grit sand paper (by hand)
Polish wheel with polish compound until it's as smooth as glass

It may look alittle rough, but it's honestly as smooth as the factory plastic

 

Looks great man!

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Thanks man!

Looks good but you have to remember with hand porting its easy to remove to much from one area and actually change the airflow or the way it swirls and make it worse sometimes. I think you really just want to smooth out the rough spots or rough casting areas. I would buy some cheap junkyard iron heads to practice on and get the feel for it. It's a long tiresome process but not hard.

Definitely agree. I didn't really port it exactly though. More so smoothed it out , only thing I guess I ported was were the injector boss is. But just going by eye to get them all pretty even.

 

Looks good but you have to remember with hand porting its easy to remove to much from one area and actually change the airflow or the way it swirls and make it worse sometimes. I think you really just want to smooth out the rough spots or rough casting areas. I would buy some cheap junkyard iron heads to practice on and get the feel for it. It's a long tiresome process but not hard.

 

I wish I had the patience to do something like this. What kind of gains have been seen by smoothing out the intake?

 

Lol! I don't mind at all because the cars down right now. Just doing 4 runners has been probably 3-4 hours of work. I think I can finish up the other ones faster now that I know what I'm doing.

Shaun at AED said about 7rwhp, but I'm hoping with more trimming to the injector boss and throttle body fins I can pick up 10-15rwhp. But... Well see! My luck I'll probably lose power lmao

 

LOL. Gotta get those 3.73 or 3.90 in that rear son!

That is a lot of work! Not as excited to do mine now...

Good thing I get 4 days off in a row every other week.

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If you basically just smooth out the sharp lines you should be okay. Can you measure the injections port before and after porting so I can simulate?

 

can you post a pic of the ported throttle body?

 

I'd rather make it smoother ... A carbureted motor is good to have rough runners... I think it'll work out better having the runners as smooth as possible..... It's not going to hurt

 

no wont hurt but the cost in materials and time is a waste.

 

Meh... I'm gonna disagree with you... It's a few bucks in materials and not much longer to hand sand it/polish it.

Unless you can prove me wrong by having a smooth boss intake vs rough boss

 

I missed many things on this forum lol, looking good bro and nice timings in your sig

 

I'm at the dyno now, going to see how it worked. I probably dropped 5-10lbs of rotating mass with the clutch/flywheel. So it's not an apples to apples comparison. I'd expect no more then 5rwhp gain from the clutch/flywheel.

I do have a little exhaust leak, but only noticeable at 1800rpm or below when I'm lugging. Also threw a p0304 code, misfire on cylinder 4... But that's just cause I need a crank relearn. Assuming it won't affect dyno since it shouldn't actually be misfiring.

 

Can't wait to see the results. And a re-match against that boss!

 

Good results! I'll post dyno in a few!

 

Its been a few!

 

Lol sorry, like an hour ride back. I'm uploading now... Be a few mins

 

opcorn

 

Its been a few more....