587 HP pump gas 360

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skrews

skrews

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Thought everyone would like this one.
Goal was for 10 sec pump gas non stroker 360.
1990 roller block tall filled, ARP main studs, line honed, square decked to .003 under.
Std volume oil pump, full groove mains, moroso deep pan. Milodon SB Chevy full legnth windage screen modified to fit
Eagle cast crank, H-beam rods, JE flat tops. 10.1:1 comp.
Crower solid roller cam .712/.712 lift 249*/254* @.050 108 sep 4* advanced
CNC ported IndyBrock heads,
Indy claimed flow #s / Actual OOTB#s / after my VJ and Ferrea valves
.100 72/66 w/o pipe... 59/49 w/pipe..... 65/49 w/pipe
.200 132/113 ......... 123/108 ............ 150/113
.300 197/145.......... 180/150 .............204/155
.400 248/170 ......... 229/178............. 248/184
.500 277/183 ......... 261/194 ............ 280/206
.600 302/191.......... 284/208 .............292/215
.700 306/197...........284/215............. 287/222
tested @ 28" ON SUPERFLO 1020 bench ( this bench has found to be very conservative )
950 Holley Ultra HP
1.75 Hooker headers 3'X17" extensions
Super Victor intake port matched 3" in to port maintaining proper port taper. 1" taper spacer
587 HP @ 6900 511 TQ @ 5200
Also tested RPM AirGap again port matched 3" into port. 1" open spacer
541 HP @ 6300-6400 508 TQ @ 4500-4600

IMG_1080_zps0c232a41.jpg


IMG_1058_zpsef6b258e.jpg

Best in car performance 1100 ft D/A
60' 1.534 330 4.452 1/8 6.95 @ 97 1000' 9.129 1/4 10.97 @ 122.1
3400 lbs Duster 904 w/low 1st gear 4500 stall 8" vert, 4.30 gear 28" tire
going threw traps at only 6700 should be 7000+
got 4.56 gear now
no where near enough converter should have about a 5800-6000
should have a 5800ish ATI converter soon
hoping to get this thing in the mid tens on 91 pump and 365 ci
 
I like it alot, very nice job. That heads and cam sure do like the SV. Biggest problem you'll have is convincing the other brands at the track that there's no 4" arm in it :D. Seriously, Congrats and keep us posted with the new conv. and gears.
 
Sweet ,Skrews! Been around a couple 340 similar builds,that Crower roller is right in the sweet spot.
 
skrews said:
Thought everyone would like this one.
Goal was for 10 sec pump gas non stroker 360.
1990 roller block tall filled, ARP main studs, line honed, square decked to .003 under.
Std volume oil pump, full groove mains, moroso deep pan. Milodon SB Chevy full legnth windage screen modified to fit
Eagle cast crank, H-beam rods, JE flat tops. 10.1:1 comp.
Crower solid roller cam .712/.712 lift 249*/254* @.050 108 sep 4* advanced
CNC ported IndyBrock heads,
Indy claimed flow #s / Actual OOTB#s / after my VJ and Ferrea valves
.100 72/66 w/o pipe... 59/49 w/pipe..... 65/49 w/pipe
.200 132/113 ......... 123/108 ............ 150/113
.300 197/145.......... 180/150 .............204/155
.400 248/170 ......... 229/178............. 248/184
.500 277/183 ......... 261/194 ............ 280/206
.600 302/191.......... 284/208 .............292/215
.700 306/197...........284/215............. 287/222
tested @ 28" ON SUPERFLO 1020 bench ( this bench has found to be very conservative )
950 Holley Ultra HP
1.75 Hooker headers 3'X17" extensions
Super Victor intake port matched 3" in to port maintaining proper port taper. 1" taper spacer
587 HP @ 6900 511 TQ @ 5200
Also tested RPM AirGap again port matched 3" into port. 1" open spacer
541 HP @ 6300-6400 508 TQ @ 4500-4600

IMG_1080_zps0c232a41.jpg


IMG_1058_zpsef6b258e.jpg

Best in car performance 1100 ft D/A
60' 1.534 330 4.452 1/8 6.95 @ 97 1000' 9.129 1/4 10.97 @ 122.1
3400 lbs Duster 904 w/low 1st gear 4500 stall 8" vert, 4.30 gear 28" tire
going threw traps at only 6700 should be 7000+
got 4.56 gear now
no where near enough converter should have about a 5800-6000
should have a 5800ish ATI converter soon
hoping to get this thing in the mid tens on 91 pump and 365 ci
Click to expand...
cool,nice build.gotta rev a little better then one with a 4 inch crank.big damn camshaft.gotta love it:burnout:
 
This cam ,is sweet! Idles nicely@ 1000 in drive.Rocker ratios,at work,Bad.Seen grinds opslike this,7500 on spray.
 
How the heck do you make that much hp.... When I have a bigger cam but less lift and 4in crank.. That's nuts
 
A 4 inch crank will torque, not so much HP. This is why 340 guys love the 340 over a 360. Screaming RPM's making mad HP.

The duration, besides dictating the power band just holds the valve open for that ground in duration. What Screwz did was use the quick lifting roller and big lift I conjunction with the big port Indybrock head to move the larger volume of air in lighting quick. The intake coupled with the unrestricted wide ports of the head start a ramming effect at higher RPM's jamming in more air and fuel.

On your engine, did you take full advantage of the heads lift & flow abilities?

Someone above said its a big cam. Not in this camp! I see it as a big small cam or a little big cam. LIFT on the other hand is (LOL) a bit more than I'm used to dealing with!

Nice job Screwz! I'd like to know what's up with the Chevy tray instead of the Chrysler tray by the company.
We're they out of them? Something different?
 
rumblefish360 said:
Nice job Screwz! I'd like to know what's up with the Chevy tray instead of the Chrysler tray by the company.
We're they out of them? Something different?
Click to expand...

Went with the full length Chevy diamond stripper screen to run the full length of the crank. Milodon nor anyone else that i know of offers a setup like this for a sb Mopar. If this setup makes power or is of any benefit is questionable, seemed like a good idea at the time lol. When these tests were conducted the engine was running 8 qts. The latest consensus is to use a deep sump (8 qt pan ) with 6 qts in it, and no tray or screen. I might pull the screen out and install a crank scraper.
 
Nice engine-well done with that little cam and low compression. If you stick that big crank and big compression under those heads you may need the converter you have now and those 4.30's back. J.Rob
 
Fst73_360 said:
How the heck do you make that much hp.... When I have a bigger cam but less lift and 4in crank.. That's nuts
Click to expand...


That's what happens when A - you know what you're doing and B - you put decent heads on it...lol. The 4" arms respond the same way - but they need better (more port volume) heads to carry the power upstairs.

Nice build Skrews
 
Moper right about that 4 inch arm. In lower power builds, it's all torque. If you decide to go for some serious power, like @ 1.8 HP per cube, the pay off starts to come around.
The smaller the engine and/or the high the RPM's the engine sees (short stroke and or higher RPM's) the higher the stress there is on the engine.

This is where builds become expensive.
 
moper said:
That's what happens when A - you know what you're doing and B - you put decent heads on it...lol. The 4" arms respond the same way - but they need better (more port volume) heads to carry the power upstairs.

Nice build Skrews
Click to expand...

my heads flow 280-290 at 500-600...Thats pretty good flow if you ask me, but his are "Indybrock" Mine are just the RHS Indy heads. ANd I do see the theme of high lift cams making this kind of horsepower. That would help explain it. Also didn't see that it's a roller block. Either way nice job!
 
Those are impressive numbers for a non-stroked pump gas motor. Job well done!
 
Fst73_360 said:
my heads flow 280-290 at 500-600...Thats pretty good flow if you ask me, but his are "Indybrock" Mine are just the RHS Indy heads. ANd I do see the theme of high lift cams making this kind of horsepower. That would help explain it. Also didn't see that it's a roller block. Either way nice job!
Click to expand...

Those heads are really awesome units. One day later on down the road, swap in a like roller that Skrews used and she'll rip your head off when the long pedal gets mashed. Ya got the head and cubes for it.
 
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