Got my HPE 415ci shortblock **pics**
06-14-2005, 07:25 PM
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Got my HPE 415ci shortblock **pics** Very happy with HPE's customer service and dealng with Erik Koenig. He returned every call I made and every email. Price was very competitive. Thanks guys!
The pistons are dished...but even with the dish the compression will work out to exactly 12 to 1. The pistons are .010 out of the hole.
I checked a few things out. Crank endplay was .003 which is fine. Everything else looked great.
I have highly skilled techs helping me ;-)
The pistons are dished...but even with the dish the compression will work out to exactly 12 to 1. The pistons are .010 out of the hole.
I checked a few things out. Crank endplay was .003 which is fine. Everything else looked great.
I have highly skilled techs helping me ;-)
Last edited by 383LQ4SS; 06-15-2005 at 06:53 PM.
06-14-2005, 09:46 PM
#4
why the reverse split on the big nasty solid roller on the lift? I see the traditional split on the duration side, makes sens for a **** load of nitrous, but why the reverse split on the lift?
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thats a pretty big cam... 
06-15-2005, 12:35 AM
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Originally Posted by SDB
why the reverse split on the big nasty solid roller on the lift? I see the traditional split on the duration side, makes sens for a **** load of nitrous, but why the reverse split on the lift?
Its actually not a reverse split. Its traditional split. The intake duration is shorter than the exhaust. The exhaust is actually pretty large due to it being a nitrous cam. The lift is inconsequential to what the split is. When you start getting into high lift cams there will be a maximum lift that will have a positve effect of flow. That maximun lift is determined by valve diameter. My intake valve is a 2.08 valve...it will benifit from even more lift that the .731 that this cam has...maybe on up to .800 lift or so. The exhaust valve is only a 1.60 so the max effective lift will be much lower than what that 2.08 intake valve will be. I suspect much over .714 wont benifit much. DO a search on Larry Meaux and Maxrace software. He is the cam genious and along with Allan Futral came up with htis cam.
Basically the smaller the valve the quicker effective lift will max out.
06-15-2005, 11:22 AM
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Good looking motor. What rotating parts were used if you don't mind me asking. I'm having a motor built (427) with HPE myself. I bought the c5-r stuff from Jason over at thunder racing and Eric has been incredibly helpful with advising me what to look out for. I'm actually sending all the stuff over to him (or Jason is anyway) to further inspect and get me a piston that will work with the 40-39cc combustion chambers and 12.5 or so to 1 compression for occassional 93 octane cruzing.
BTW, if what you say is true about valve lift what about a 2.18 intake valve? Since I don't like changing valve springs every month I'll probably stick with something in the .750 range anyway.
BTW, if what you say is true about valve lift what about a 2.18 intake valve? Since I don't like changing valve springs every month I'll probably stick with something in the .750 range anyway.
Last edited by DAPSUPRSLO; 06-15-2005 at 12:22 PM.
06-15-2005, 01:37 PM
#13
Originally Posted by 383LQ4SS
Its actually not a reverse split. Its traditional split. The intake duration is shorter than the exhaust. The exhaust is actually pretty large due to it being a nitrous cam. The lift is inconsequential to what the split is. When you start getting into high lift cams there will be a maximum lift that will have a positve effect of flow. That maximun lift is determined by valve diameter. My intake valve is a 2.08 valve...it will benifit from even more lift that the .731 that this cam has...maybe on up to .800 lift or so. The exhaust valve is only a 1.60 so the max effective lift will be much lower than what that 2.08 intake valve will be. I suspect much over .714 wont benifit much. DO a search on Larry Meaux and Maxrace software. He is the cam genious and along with Allan Futral came up with htis cam.
Basically the smaller the valve the quicker effective lift will max out.
Basically the smaller the valve the quicker effective lift will max out.
How do you like the Flo controller? Do you still have the nitrogen push system? I run a 200 wet shot and even with a 15 lb bottle, it takes a little bit to get the pressure up again for another hit.
06-15-2005, 03:46 PM
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Originally Posted by DAPSUPRSLO
BTW, if what you say is true about valve lift what about a 2.18 intake valve? Since I don't like changing valve springs every month I'll probably stick with something in the .750 range anyway.
This is from an engineering website where Larry posts on occasion. This is from one of his posts.
on older style cyl heads that have abrupt short turns
the Max_Useable_Valve_Lift = .37 * Intake_Valve_Diameter
on ProStock Technology;
the Max_Useable_Valve_Lift = .39 * Intake_Valve_Diameter
to
the Max_Useable_Valve_Lift = .41 * Intake_Valve_Diameter
anything greater seems to loose too much curtain area velocity without gaining enough CFM flow
.42 * Intake_Valve_Diameter would be the most Lift possible that would make Power
the Max_Useable_Valve_Lift = .37 * Intake_Valve_Diameter
on ProStock Technology;
the Max_Useable_Valve_Lift = .39 * Intake_Valve_Diameter
to
the Max_Useable_Valve_Lift = .41 * Intake_Valve_Diameter
anything greater seems to loose too much curtain area velocity without gaining enough CFM flow
.42 * Intake_Valve_Diameter would be the most Lift possible that would make Power
Here is a link to the site and his post. There is also great info on where to maximize flow #s VS lift.
http://www.eng-tips.com/viewthread.cfm?qid=92513&page=5
06-15-2005, 04:31 PM
#16
Originally Posted by Got Me SOM
that thing should scream, I'd like to come see her run when she's all done.
j/k please dont beat me up now...The engine looks sweet. Im terribly jealous. What heads are gonna give you that kinda compression with the dish?
06-15-2005, 05:01 PM
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TEA stage #3 LS6 heads with 60 cc chamber. Same heads that made 522 rwhp on the lil 385 motor partially tuned. As a matter of fact...the only differences from this time and last time will be:
+30 cubes
+ .5 compression
dished pistons
ported FAST intake
aluminum DS (will put the Dennys back in later)
radial tires instead of 28x12.5 slicks
Im thinking 575 rwhp NA shouldnt be too much of a stretch. We will see.
+30 cubes
+ .5 compression
dished pistons
ported FAST intake
aluminum DS (will put the Dennys back in later)
radial tires instead of 28x12.5 slicks
Im thinking 575 rwhp NA shouldnt be too much of a stretch. We will see.
06-15-2005, 07:10 PM
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Originally Posted by 383LQ4SS
This is from an engineering website where Larry posts on occasion. This is from one of his posts.
SO for your app it looks like approximately .39 x the intake valve diameter may be benificial in an all out race application. Thats .39 x 2.18 = .850 lift that you would likely see gains up to. Of course you have to weight that against spring life and such and what your doing with the car. You dont NEED to run that much. He is just saying you may see gains up to that point....but nothing beyond.
Here is a link to the site and his post. There is also great info on where to maximize flow #s VS lift.
http://www.eng-tips.com/viewthread.cfm?qid=92513&page=5
SO for your app it looks like approximately .39 x the intake valve diameter may be benificial in an all out race application. Thats .39 x 2.18 = .850 lift that you would likely see gains up to. Of course you have to weight that against spring life and such and what your doing with the car. You dont NEED to run that much. He is just saying you may see gains up to that point....but nothing beyond.
Here is a link to the site and his post. There is also great info on where to maximize flow #s VS lift.
http://www.eng-tips.com/viewthread.cfm?qid=92513&page=5