• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Pop's 440 is near ready to dyno.

Reworked the heads a little retaining the stock valves and reused the Performer RPM intake.

500 LB-FT @ 3700 RPM and 498 HP @ 5400 RPM

Put on a Torker II intake

488 LB-FT @ 3700 RPM and 503 HP @ 5400 RPM

Put on M1 single plane

488 LB-FT @ 3700 RPM and 507 HP @ 5400 RPM

M1 single plane and 2" carb spacer

502 LB-FT @ 3700 RPM, 512 LB-FT @ 4900 RPM and 519 HP @ 5400 RPM
 
Wow, it likes that M1 with 2" carb spacer combo! Dumb question, is it a four hole or one hole spacer?
 
Impressive numbers there!

- - - Updated - - -

A few questions on the XE285HL cam you are using. Do you think that cam would perform better than the old 509 cam in a 451 with 915 heads? 13 to 1 C/R. Also, would the stock stamped steel rocker arms work OK at that lift of .545"? And does that cam with the hyd lifters lose the ability to follow the cam profile at higher RPMs (above 5500)? Due to a lifter problem? Ok thanks.
 
Reworked the heads a little retaining the stock valves and reused the Performer RPM intake.

500 LB-FT @ 3700 RPM and 498 HP @ 5400 RPM

Put on a Torker II intake

488 LB-FT @ 3700 RPM and 503 HP @ 5400 RPM

Put on M1 single plane

488 LB-FT @ 3700 RPM and 507 HP @ 5400 RPM

M1 single plane and 2" carb spacer

502 LB-FT @ 3700 RPM, 512 LB-FT @ 4900 RPM and 519 HP @ 5400 RPM

So it seems safe to conclude that this engine likes a bit more plenum volume, and/or the transition to the plenum was better w/ the tapered spacer. You guys ever used shear plates?

I'm a little confused...so the torque peaked at 3700 w/ all intakes, but w/ the carb spacer on the M1 peaked at 4900? Or was this just a blip on the curve and it's otherwise flat, maybe carrying it out a bit farther in the last test? Seeing if any conclusions can be made about in runner length and peak torque....

Do you have the runner min CSA available and where in the runner it occurs?

Ya know, I don't see it mentioned, what are you using for exhaust?

This is great info...thanks.
 
So it seems safe to conclude that this engine likes a bit more plenum volume, and/or the transition to the plenum was better w/ the tapered spacer. You guys ever used shear plates?

I'm a little confused...so the torque peaked at 3700 w/ all intakes, but w/ the carb spacer on the M1 peaked at 4900? Or was this just a blip on the curve and it's otherwise flat, maybe carrying it out a bit farther in the last test? Seeing if any conclusions can be made about in runner length and peak torque....

Do you have the runner min CSA available and where in the runner it occurs?

Ya know, I don't see it mentioned, what are you using for exhaust?

This is great info...thanks.

Back to back runs M1, M1 w/spacer torque only, I'm tired.

RPM..............M1..............M1 + Spacer

3000...........424..................428
3100...........423..................439
3200...........427..................457
3300...........452..................467
3400...........477..................478
3500...........480..................488
3600...........479..................492
3700...........487..................502
3800...........487..................492
3900...........485..................490
4000...........479..................485
4100...........477..................487
4200...........480..................489
4300...........488..................494
4400...........498..................507
4500...........503..................514
4600...........497..................507
4700...........490..................509
4800...........493..................512
4900...........504..................512
5000...........499..................512
5100...........493..................502
5200...........495..................504
5300...........499..................510
5400...........493..................505
5500...........482..................495
5600...........469..................480
5700...........465..................473

I haven't measured the min CSA.

Our dyno headers are short tube step 1-3/4, 1-7/8, 2" to a 3" collector.

Impressive numbers there!

- - - Updated - - -

A few questions on the XE285HL cam you are using. Do you think that cam would perform better than the old 509 cam in a 451 with 915 heads? 13 to 1 C/R. Also, would the stock stamped steel rocker arms work OK at that lift of .545"? And does that cam with the hyd lifters lose the ability to follow the cam profile at higher RPMs (above 5500)? Due to a lifter problem? Ok thanks.

I wouldn't run the stock rockers on the XE285HL. The reason being, as you suggested, valve train instability. Yep we lost control at about 5,300 rpm and that was with very little preload, maybe 1/16 turn. The cam should be run at zero preload as far as I'm concerned. I've backed the preload off, not to the point of lifter rattle but very close. It will now wind to 5,700 before it will stumble. I've not tried higher rpm's yet. I'm just going to put solid lifters on it now. The springs they recommend (924-16) have too much lift before coil bind. They dance around and chew up the spring shims. I've shortened the installed height from 1.900 to 1.850 (110# to 140#, no it didn't effect the valve train stability) and the shim wear is much better now.

I don't know which would be the better of the two cams. they are in kinda what I would call a transitional lift range and the cylinder head lift flows would determine which cam to use. (cylinder heads, cylinder heads, cylinder heads!) I chose the Comp Cam because I needed more lift to test some of our theories.
 
Thank you sir, your efforts are greatly appreciated.
 
We are ready to go again tomorrow morning. The engine is back to the Performer RPM intake and this time we are using 1.81 exhaust valves in the heads (big jump in exhaust flow) and in an effort to wind this dog higher we have installed solid lifters on the XE285HL cam. The lifters are broken in and the inner springs have been re-installed. We'll warm her up and check the hot lash before we make a pull.
 
So you will set the valve lash at .006" hot? Is this the normal valve lash when putting solid lifters on a hydraulic cam? Will be interesting to see if the engine revs clean past the 5700 RPM limit you were at with the hyd lifters.
 
Installed the solid lifters (.005" hot lash) and the 1.81 exhaust.

3600..........500 lb-ft
3700..........499
3800..........506
3900..........510
4000..........510
4100..........507
4200..........499
4300..........498
4400..........491
4500..........491
5400..........494...........507 hp
5500..........493...........517
5600..........484...........516
5700..........468...........508
5800..........453...........501
5900..........446...........501
6000..........438...........500
6100..........429...........498

Ready to go again with the 346 heads flowing

.500..............274/232
.600..............295/248
.700..............303/257
 
RPM.......Ported 346.....Ported 346 big valves........M1 & 2" spacer

3000....434TQ/248HP............426/243......................410/234
3100........444/262...............435/257.......................417/246
3200........450/274...............446/272.......................436/266
3300........478/300...............467/293.......................459/288
3400........488/316...............478/309.......................478/309
3500........496/330...............492/328.......................476/317
3600........499/342...............503/345.......................484/332
3700........500/352...............503/354.......................492/347
3800........498/360...............505/365.......................503/364
3900........486/361...............506/376.......................501/372
4000........485/369...............509/387.......................505/384
4100........482/376...............506/395.......................501/391
4200........484/387...............503/403.......................502/401
4300........485/397...............497/407.......................499/409
4400........482/404...............491/411.......................503/422
4500........484/415...............485/416.......................499/428
4600........481/421...............482/422.......................496/435
4700........476/426...............484/433.......................506/452
4800........476/435...............490/448.......................507/463
4900........485/452...............491/458.......................517/483
5000........484/461...............496/472.......................518/493
5100........478/464...............494/479.......................516/501
5200........476/471...............486/482.......................511/506
5300........486/490...............496/500.......................517/522
5400........485/498...............503/517.......................522/537
5500........474/496...............499/523.......................515/540
5600........461/491...............492/524.......................503/537
5700........459/496...............473/513.......................489/531

This is 445.9 ci, 8.9:1 compression and a XE285HL cam.

Time to ready the EZ heads (that'll be 10.4:1 compression) and the solid roller cam.
 
Are you gonna do the head change, test, then roller cam, then test or both at the same time before the next test?

Reason I ask is I was discussing RPM heads and MP's straight plug version of the RPM heads with an engine builder and he was making a case for may as well step up to the EZs at that point because he was seeing 50 extra hp using the EZs vs. using the RPMs/MPs all else being equal.

So I'm curious as to how big a jump going from the ported iron the the EZs.
 
Those are awesome numbers IQ. My bet is the new peak HP will be 615 with your proposed changes (M1 w/spacer).
 
Are you gonna do the head change, test, then roller cam, then test or both at the same time before the next test?

Reason I ask is I was discussing RPM heads and MP's straight plug version of the RPM heads with an engine builder and he was making a case for may as well step up to the EZs at that point because he was seeing 50 extra hp using the EZs vs. using the RPMs/MPs all else being equal.

So I'm curious as to how big a jump going from the ported iron the the EZs.

These EZ heads are going to be, well, not a run of the mill affair, so I don't know how much help the test will be for you. An out of the box RPM should kill an out of the box EZ to .500" lift. If you work the EZ heads over, sure they'll be better than the RPM.

To your question. EZ with the XE285HL, then EZ with the solid roller, then solid roller with the 346 heads. That's the plan right now anyway.

I'm still dinking with the EZ combustion chamber opening it to 79cc from 75cc. Right now they are flowing:

lift.........intake..........exhaust

.100.......82.................67
.200......158...............129
.300......222...............175
.400......263...............217
.500......307...............250
.600......342...............276
.700......360...............293

If I remember correctly we are going to lift the roller to about .630".
 
I gotta get something to eat. But before I go 528 TQ and 590 HP. Still using the 346 iron heads.
 
Auto Transport Service
Back
Top