99 Cobra / engine questions

[austin21]

Depending on mileage I'd get them cleaned, maybe a valve job, and new seals. But for power there's no problem making that with the 99/01 heads.

I’m thinking of getting the ModMax shortblock and selling my factory shortblock afterwards to recoup some money

Do you have any experience with ModMax parts or short blocks?

4.6 Short Block - Street 600HP 2V & 4V - Cast Iron Block

ModMax proudly offers the best 4.6 , 5.0 , & 5.4 Ford Modular engine parts in the world. From cranks, stroker kits, rods, and pistons to valvetrain and more!

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Would cost me just about the same either route I chose however if I sold my old shortblock I could recoup a bit.

 

[01yellercobra]

I've never bought a shortblock from anyone. But something to consider is the Romeo blocks are iron. So it'll add about 80lbs to the nose of your car.

 

[bird_dog0347]

If you already have a good Teksid block and Kellog crank, just keep those and do forged rods and pistons, as well as a few of the Cobra Engineering parts for reliability on the timing side.

 

[austin21]

If you already have a good Teksid block and Kellog crank, just keep those and do forged rods and pistons, as well as a few of the Cobra Engineering parts for reliability on the timing side.

Yeah I’m just considering my options. Either route or re using or buying a new block is going to be around the same price.

 

[Badaz01]

Do you know if the 99 cobra heads are reliable for up to 550-600hp?

Looking at getting the bottom end forged and the shop is asking if I want to do heads also.

I made 600 whp with the 01 heads. Can’t say no issues though. Just had a cam sprocket bolt break off.

 

[Badaz01]

Yeah I’m just considering my options. Either route or re using or buying a new block is going to be around the same price.

I’d have the teksid built that way you know what you have.

 

[Badaz01]

Yeah I’m just considering my options. Either route or re using or buying a new block is going to be around the same price.

I am actually in the process of rebuilding now. I have the wap block bored .20 over with wiseco pistons this time around. Re using the Manley h beams and the Kellogg factory crank myself. Also had the heads re worked. Just a stock refresh.

 

[austin21]

I made 600 whp with the 01 heads. Can’t say no issues though. Just had a cam sprocket bolt break off.

Have you ever had your cam drive kit replaced?

I just had mine done with my new stage 3 comp cams last year.

4.6L 4V CAMSHAFT DRIVE KIT

4.6L 4V CAMSHAFT DRIVE KIT|Ford Performance Parts

performanceparts.ford.com

 

[Badaz01]

Have you ever had your cam drive kit replaced?

I just had mine done with my new stage 3 comp cams last year.

4.6L 4V CAMSHAFT DRIVE KIT

4.6L 4V CAMSHAFT DRIVE KIT|Ford Performance Parts

performanceparts.ford.com

Yes

 

[01yellercobra]

I wouldn't call a broken cam bolt an issue with the head. If a cam cap busted then I'd say the head is an issue.

 

[Badaz01]

I wouldn't call a broken cam bolt an issue with the head. If a cam cap busted then I'd say the head is an issue.

Yea I’m not sure what happened with mine. I am however getting custom cams from Todd warren and it looks like the cam bolts that go with them are thicker.