Highest HP attainable with M7's

Recent Dyno day we did 595hp fuel only and 749hp with spray but on Mach 6's and a single HTT QD 64 and a HRVP so easy in the 600's fuel and 750+ on spray.....with the 7's
 
As mentione above did 830+ with M8's, Steroid B1 (about equal to a 64mm), SO-VP44, and some squeeze. With the M7's I was able to make about 20 RWHP less on the squeeze but made around 15 more than the 8's on #2.

Doug
 
Jetpilot said:
As mentione above did 830+ with M8's, Steroid B1 (about equal to a 64mm), SO-VP44, and some squeeze. With the M7's I was able to make about 20 RWHP less on the squeeze but made around 15 more than the 8's on #2.

Doug
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Good to see you back on here Doug...how long ago was that, 2005??

Long time ago now!
Chris
 
I wish I still had that B1 Steroid, it out performed an 64/13/71 and a 66/14/71 on my 24v
 
Why not Dan...us Southern OH boys can do math...those Woodruff stickers really add the power:hehe: :hehe:

Chris
 
RonA said:
I'm anxious to try again on another dyno to double check. I was suprised at the number, but I guess it is possible. This new pump puts out about the same fuel with the plate back as my 12mm did plate forward. CDS says 550cc at the rear, 750cc at the front. I am running smaller delivery valves than they used to set it up, but my plate is slightly forward(around 1/4 of the way). I am running 5 degrees more timing than before and a larger primary. I saw 711hp with my old setup (same secondary, S480, and my 887 pump that was supposed to be around 575cc). On that run I saw about 65psi total with about 32-35psi out of my S480. With the new setup I saw just over 70 psi total with 40psi out of my GT4718(88mm inducer). Much less rack travel, 5 degrees more timing, more air. We'll see what happens when I give it a chance to stretch it's legs.
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RonA did 711 with a 64 over S480. i was told a s480 was good for 800+hp.

Surely Ron had enough fuel for 800 or no? Did he not have enough air?

Or is 800+ with 64 over S480 only on CRs?
 
Jetpilot said:
As mentione above did 830+ with M8's, Steroid B1 (about equal to a 64mm), SO-VP44, and some squeeze. With the M7's I was able to make about 20 RWHP less on the squeeze but made around 15 more than the 8's on #2.

Doug
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sorry if i missed it but what kind of power was it on #2 ?
 
Diesel Only:

VP44 = 600-675
P7100 12mm = 700-800
P7100 13mm = 800-1K+

for sizing reference: The 7s have a typical flow rate around the same as our honed HR370 for the 12V. Those have made 800+ in a 12V with a single turbo. That was back in 2003.

Twins really help the 7's work best.
 
Soup Nazi said:
Diesel Only:

VP44 = 600-675
P7100 12mm = 700-800
P7100 13mm = 800-1K+

for sizing reference: The 7s have a typical flow rate around the same as our honed HR370 for the 12V. Those have made 800+ in a 12V with a single turbo. That was back in 2003.

Twins really help the 7's work best.
Click to expand...


What chargers do you recommend, street able stuff.
 
bsmith said:
RonA did 711 with a 64 over S480. i was told a s480 was good for 800+hp.

Surely Ron had enough fuel for 800 or no? Did he not have enough air?

Or is 800+ with 64 over S480 only on CRs?
Click to expand...

I made 711 with a 12mm pump and an S480. I made the same power with a 75.83/1.1 S400 primary. The s480 pulled a bit stronger on top but was harder to get going on the dyno. Above 100mph the difference was pretty noticeable. I'd say it was probably more in the 740-750 range with the s480 had I done some playing with the setup to get it spooling better on the dyno. I have been trying to keep my torque numbers down by spooling the chargers a bit later and holding the fuel back untill 55-60psi. It helps it run cleaner and makes my tranny happy(er). My afc does not move till 20psi and it tends to have a hard time getting over the hump on the dyno. A turn on the pre-boost screw would help, but I haven't had time to play with it.
 
RonA said:
I made 711 with a 12mm pump and an S480. I made the same power with a 75.83/1.1 S400 primary. The s480 pulled a bit stronger on top but was harder to get going on the dyno. Above 100mph the difference was pretty noticeable. I'd say it was probably more in the 740-750 range with the s480 had I done some playing with the setup to get it spooling better on the dyno. I have been trying to keep my torque numbers down by spooling the chargers a bit later and holding the fuel back untill 55-60psi. It helps it run cleaner and makes my tranny happy(er). My afc does not move till 20psi and it tends to have a hard time getting over the hump on the dyno. A turn on the pre-boost screw would help, but I haven't had time to play with it.
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Thanks Ron!

740-750 is still 50-100hp under what I was told by well known turbo place for a S480.

That's why I was wondering if you needed more fuel or if the S480 was maxed out.

Its seems like the S480 is not the great charger like everyone is recommending.

What's spool up like with the 4718?
 
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It was a fuel issue not an air issue. I prefer the 4718 over the S480, but i have been called turbo retarded before.
 
RonA said:
It was a fuel issue not an air issue. I prefer the 4718 over the S480, but i have been called turbo retarded before.
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What's the specs on the 4718?

I tried looking but couldn't figure it out.

Is it BB?

What rpm does it lite on the street?
 
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