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[Ghost Rider]

Hoist, that's with 258 cams and more compression. I was told by the dealer that these numbers were better than they expected. I would like to know how some folks here are getting the 120 range numbers with less mods than I  had done. What are you doing. And you may have been mislead to believe you may get those high numbers. When are you going to have your mods done, can't wait to hear how it goes. Maybe it's my tuner, but don't think so. Suppose to be very good. 

You can see below the mods I did to my bike to get to the 120/125 range.  And I had an average turner, at best.  I am guessing Howie's guy will get him there.  He better, or he will face the wrath of Hoist, and nobody wants to see that.   

[Hoist!]

You can see below the mods I did to my bike to get to the 120/125 range.  And I had an average turner, at best.  I am guess Howie's guy will get him there.  He better, or he will face the wrath of Hoist, and nobody want to see that.   

You got that right Travis! Hoist!

[StreetDog]

Ghost Rider , did you do some work on your heads or just change them out...so they would match those pistons? What do you think about me going to the 260 cams since I have uped the compression some.

[Ghost Rider]

Ghost Rider , did you do some work on your heads or just change them out...so they would match those pistons? What do you think about me going to the 260 cams since I have uped the compression some.

We didn't do any headwork, other than repairing the clearance issues.  As for the 260 cams, I'll let one of our local experts field that one.  The tech that did my engine build recommended the SE251 cams for low end torque, which was what I was going for so thats why I went with those. 

[GMR-PERFORMANCE]

Compression is king when it comes to matching a cam shaft. For a SE cam the 251 is not a bad choice. The 50MM is another good choice and a great bang for the buck deal as you get larger injectors in the new unit. The new injector is a 4.9 vs a 3.9 injector.  If you can have the heads cleaned up i would do so. You can do some minor work without breaking the bank, and have some great gains overall. Cost on clean up, CC the chambers, milling, valve cut and new seals would run in the 350 range. add a .030 head gasket to get your squish correct and you are ready to have some fun.  Or just swap the cam in and enjoy the added power.

[StreetDog]

GMR PERFORMANCE.. I am thinking about switching to the se251 cams based on what I am reading here. My question is now that I uped the compression with 10.25 to 1 pistions and a .30 head gaskit ( was told this would equal 10.5 to 1 ) ..would the se251 still be a good choice or should I stick with the se257 , se258 or se260. Not getting the results I was looking for with the se258. Very low HP and TQ numbers for the mods done, ( 106hp and 100.75tq ) Maybe I am missing something...50mm TB or something else?

[GMR-PERFORMANCE]

Well really the heads need to be CC"d not a guessing game. But if you are in the 10.3 range with would run well the 257 is a better stick than the 258 but needs 10.5 as a min 10.8 wakes the engine up. Look at the intake close point as that is the starting point and you work from there. The 258 is a 52 so you really need some compression to give you some good low end. Where as the 257 has a 48 closing point so it will respond better with lower compression.  AS well the 258 has too long of a intake closing point to really work well with low compression in my opinion. The 251 has a 46 closing point so it will run better with lower comperssion

[StreetDog]

GMR PERFORMANCE, Are you saying that with the 10.25 to 1 pistons and .030 head gasket I should be about 10.3 to 1 compression and not 10.5 in our opinon? And also are you saying the se257's work very well at the 10.3 compression range. Or do the se257's really need at least 10.5. And I suppose you mean that the se258's need at least 10.8 or better? I feel good about the headwork done although they were not cc'd. This guy use to do the headwork for Kendall Johnson. Would the 50mm TB wake this motor up with these mods? And do you feel the TB change is needed. Please give me more details, I didn't understand your last post. But sounds like I ready need the se257's and would the 50mm TB add more compression by forceing in more air/fuel mixture.