Engine build part two.

[Badaz01]

Well as some of you may know I recently broke a cam sprocket bolt and bent some valves and that was it. Or… so I thought. Upon tear down we found the top ringland on #5 is broken so here I go again to pretty much a complete rebuild. So at this point I just got an update on the block needing s .020 bore and just a valve job on the driver side head. The machine shop decided on a wiseco-16 cc piston which will put me at about 9.1 compression. Hopefully this one pans out a little better with no mishaps. I’ll keep you guys up to speed as things progress.

 

[SGT MERC]

That's the same piston, armor plated, I'm running in my Marauder.

Sent from my SM-N975U1 using the svtperformance.com mobile app

 

[Badaz01]

That's the same piston, armor plated, I'm running in my Marauder.

Sent from my SM-N975U1 using the svtperformance.com mobile app

Nice. I looked them up they use the good forging material I think 2618 I can’t remember anyway it’s supposed to be the strongest aluminum they seem pretty good. I had a flat top Manley in before the high compression was ok but it made me a paranoid freak with fuel quality. Hopefully dropping the compression will make it a little safer.

 

[Badaz01]

I was looking at putting a timing cover on for a 99 cobra that way I can use a three bolt tensioner. Any of you guys ever do that and what does it take different to do so. Keep in mind I have a d1 sc procharger.

 

[DSG2003Mach1]

I was looking at putting a timing cover on for a 99 cobra that way I can use a three bolt tensioner. Any of you guys ever do that and what does it take different to do so. Keep in mind I have a d1 sc procharger.

I would definitely do that, POS single bolt bullshit

I’m gonna guess it’s a different blower bracket. I was talking to a local shop about this, he said they also drill out the tensioner mounting bolt holes so they can use larger bolts but don’t believe he said what size. I kick my own ass all the time for not doing it last time the motor was out

 

[Badaz01]

I would definitely do that, POS single bolt bullshit

I’m gonna guess it’s a different blower bracket. I was talking to a local shop about this, he said they also drill out the tensioner mounting bolt holes so they can use larger bolts but don’t believe he said what size. I kick my own ass all the time for not doing it last time the motor was out

I’m a definitely look into this further. The bracket is definitely different as long as the power steering pump location is the same I don’t see why it won’t work. I tried Google and so far no real straight definitive answers. Did they drill the bolt holes on the three bolt or the single?

 

[DSG2003Mach1]

The use larger bolts on the three bolt tensioner

 

[Badaz01]

I was also kicking around the idea of sleeving the engine block. Not sure if that would be necessary for a 600 whp car or just call it a day with the .020 bore ?

 

[Deceptive]

I was also kicking around the idea of sleeving the engine block. Not sure if that would be necessary for a 600 whp car or just call it a day with the .020 bore ?

You will be fine at .02 over and 600hp.


Like stockings by the chimney,
I’m hung.

 

[Badaz01]

The use larger bolts on the three bolt tensioner

From what I’ve found so far the 99 cover is the same from 96-99 and will bolt right up to my engine. I’ll have to get a procharger bracket for a99 as well as the tensioner of course. That will definitely give me more options for tensioners especially if I want to go 8 rib.

 

[Badaz01]

Well got some goodies back from the machine shop today. Keepin the ball rolling right along. Anyone know off hand what compression will result from a -13 cc piston dish with 52cc heads by chance?

 

[52merc]

I calculate a CR of 9.04:1 using 52.0 cc combustion chamber volume and head gasket bore of 3.622" and compressed thickness of 0.036". With a 0.020" overbore the displacement is 4.65L [283.9 in³]. FYI, the Wiseco catalogue for the K0080X2 (-13 cc) piston shows 8.8:1.

 

[Badaz01]

I calculate a CR of 9.04:1 using 52.0 cc combustion chamber volume and head gasket bore of 3.622" and compressed thickness of 0.036". With a 0.020" overbore the displacement is 4.65L [283.9 in³]. FYI, the Wiseco catalogue for the K0080X2 (-13 cc) piston shows 8.8:1.

Ok thanks. I better turn up the boost some then. I’m currently running a 10% od crank pulley I may put a 15% on. The 10 with my 4.1 blower pulley has me at 14# of boost now.

 

[Badaz01]

I calculate a CR of 9.04:1 using 52.0 cc combustion chamber volume and head gasket bore of 3.622" and compressed thickness of 0.036". With a 0.020" overbore the displacement is 4.65L [283.9 in³]. FYI, the Wiseco catalogue for the K0080X2 (-13 cc) piston shows 8.8:1.

I think the 8.8 is for the 5.4L compression. These will work in either or.

 

[52merc]

 

[Badaz01]

View attachment 1821992

Cool. So I’d say your correct on the 9 to 1 giving the 52cc head volume and that the 03/04 cobras have the same head volume with an -18cc piston for a 8.5 to 1 compression.

 

[Badaz01]

Stoped at my engine builders garage today to order the final parts for my short block and he mentioned maybe putting different cams in. He did mention that I would lose some low end power. He made mention of Todd warren cams. Not sure if I want to do this or not. Do you guys know if a custom cam can be cut by Todd warren to meet in the middle if you will so I don’t completely dog out my bottom end. I’m already sacrificing a little by lowering my set up to 9to1 compression.

 

[5.0 Hatch]

Stoped at my engine builders garage today to order the final parts for my short block and he mentioned maybe putting different cams in. He did mention that I would lose some low end power. He made mention of Todd warren cams. Not sure if I want to do this or not. Do you guys know if a custom cam can be cut by Todd warren to meet in the middle if you will so I don’t completely dog out my bottom end. I’m already sacrificing a little by lowering my set up to 9to1 compression.

I'm sure Todd can accommodate whatever goal you have but cams are very expensive and in my opinion, on a boosted application, it's really not worth it.

 

[Badaz01]

I'm sure Todd can accommodate whatever goal you have but cams are very expensive and in my opinion, on a boosted application, it's really not worth it.

How much power would they add. I’m kinda thinking along the same lines you are. Especially at 1800 dollars.

 

[5.0 Hatch]

How much power would they add. I’m kinda thinking along the same lines you are. Especially at 1800 dollars.

30-40 on a N/A build so very similar or a tad more boosted. I'd just drop a pulley size and keep my OEM driveability.