Super Jet Speedwerx Dry pipe on 62T 760?

[motobehrens]

Looking for any input regarding putting a speedwerx dry pipe on a 62T 760 in an 08 style superjet. The pipe was previously used on a 61x big bore cylinder. I'm assuming just drill out the bolt holes for the larger bolts? Do the exhaust and cooling passages on the manifold and cylinder line up, or will the manifold need matched to the 62T cylinder? Did speedwerx ever make an exhaust manifold for the 62T? What RPM range will i be in with this pipe. It's going on a bouy/carving ski, not a freestyle ski.

thanks,

 

[Big Kahuna]

you can either drill out the holes on the manifold or you can put some inserts into the cylinder and reduce down the thread size. As far as lining up, yes it will. As far as port matching, you can bolt up and run, but you may want to check it, Any time you match the ports, it is going to flow better.

 

[xjetrider]

You will have to drill out the bolt holes for 10mm bolts. The cooling passages should line up good enough but you will probably have to do some grinding to get the exhaust passage to match up. We never made a exhaust manifold for the 62T cylinder. As far as RPM goes, our superstock engines made their best power at 7600 RPM with this pipe.

 

[Big Kahuna]

Pssst, You might could sell some if you started builidng them again!!!!!!!!!!!!!!!!!!!!!!!!!

 

[motobehrens]

An answer straight from the source, with the info I was looking for.
Thanks guys.

 

[Waternut]

xjetrider is a great guy. He came out of no where and started helping me out with my speedwerx motor that I bought off someone else.

 

[waxhead]

Screw in a 8mm helicoil it fits straight in there and they never come out

 

[cattledog]

when i had a speedwerx pipe on my sn it was crazy fast on the top end i should have kept that pipe

 

[Waternut]

when i had a speedwerx pipe on my sn it was crazy fast on the top end i should have kept that pipe

I think that's what most people have said who had one with a water filter and properly aligned. Others who didn't do either always seemed to complain about how much trouble they were. I'm still thinking about modding my hull to accept one of these but it'll take a lot of work for me because of my custom hull.

 

[MTRHEAD]

Speedwerx pipe was the best. Heavier than the later Type 9's but power wise 7620-7700rpm PERFECTION

 

[kevbo]

What would it rev on a low port engine?

 

[Half flip95]

Speedwerx pipe was the best. Heavier than the later Type 9's but power wise 7620-7700rpm PERFECTION

What was the maintenance schedule for replacing rings, wrist pins, and crankshaft bearings?

 

[MTRHEAD]

What was the maintenance schedule for replacing rings, wrist pins, and crankshaft bearings?

Difficult question. Depends on your detonation level and somewhat rpm.

Personally I ran all oem bearings, ran 62t pins in the RD flat top pistons (Kawasakis forgings). I know some people were changing 20 hr mark but thats a little crazy if your still hold compression and no deto issues. Cranks always OEM and welded - sometimes different base rod pins/bearings if it was a crank that was rebuilt to be fresh

Detonation is main the killer of all the parts you listed.

 

[Half flip95]

Difficult question. Depends on your detonation level and somewhat rpm.

Personally I ran all oem bearings, ran 62t pins in the RD flat top pistons (Kawasakis forgings). I know some people were changing 20 hr mark but thats a little crazy if your still hold compression and no deto issues. Cranks always OEM and welded - sometimes different base rod pins/bearings if it was a crank that was rebuilt to be fresh

Detonation is main the killer of all the parts you listed.

Copy. I will keep monitoring for detonation. I run good gas.

I'm revving it to exactly the range you mentioned 7620-7700

Not using the speedworx pipe, but rather a Powerfactor Pipe on an Xscream SS900. Oem welded crank / wiseco flat tops. ect. In an 08+ Style superjet

I will start taking compression numbers around the 20 hr mark. I hoping to get to 40hrs on rings and top-end bearings then tear down and inspect crank / replace pistons at 80.

Thank you for your input.

 

[Storbeck]

I think MTRHEAD was talking about intervals for a race engine that spends a high percentage of it's time at full load and high rpm. I would think (but I don't know) that a freestyle motor would spend a much lower percentage of it's running time at full load and so probably last longer.

The freestyle motor probably drinks more water though.

Sooo...I dunno.

 

[Half flip95]

This is definitely set-up in a race application and the information provided was spot on for what I was searching for.

 

[Storbeck]

Oh man I didn't even see that it's in a superjet hull I saw xscream motor and lay down pipe and assumed freestyle.

The danger of assuming!