That is true...if and only if you have enough octane, no detonation, and the timing backed WAAAAAAAY down.
There is a reason people run o ringed blocks and cometic gaskets, and I assure you it's not only for that 8%!
What are you doing for trans, converter, drivshaft, and differential ?? My car will only be about 100# lighter than yours.
I have a dynamic converter but 727 needs rebuilt as I think the pump went out. It had been hack job manual shift converted and ran full line pressure at all times.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: 70's small block durability mods for 700hp
[Re: Prochargedmopar]
#2355644 08/17/1708:22 PM08/17/1708:22 PM
A guy w/ a nice SB Dart at the track talked to me about how Herb McCandless had stressed to him that the stock-ish oil system on his car needed some upgrades (baffled pan and I don't recall what else) to keep the bottom end happy.
If you haven't already given some serious thought to that, I'd say now's the right time. The other guy didn't take Herb too seriously at the time, and then told me later how he hurt the bottom end just like ol' Herb warned him would happen.
Hey, sometimes even free advice can actually have some value...
Re: 70's small block durability mods for 700hp
[Re: BradH]
#2356378 08/19/1702:24 AM08/19/1702:24 AM
A guy w/ a nice SB Dart at the track talked to me about how Herb McCandless had stressed to him that the stock-ish oil system on his car needed some upgrades (baffled pan and I don't recall what else) to keep the bottom end happy.
If you haven't already given some serious thought to that, I'd say now's the right time. The other guy didn't take Herb too seriously at the time, and then told me later how he hurt the bottom end just like ol' Herb warned him would happen.
Hey, sometimes even free advice can actually have some value...
Yes sir, I will heed your warning. From reading up on some oiling mods the first thing that popped out to me is the pickup size (low pressure/suction side) and your right. Keeping the pickup covered too.
I will weld in baffle and flair the sides of the pan while I'm at it.
After making the vid and showing my front 2 mains were worn through to the copper I originally thought it was the supercharger tugging on the crank.
After reading the oiling mods thread on moparchat I now think those front two were getting less oil than the rest.
I've decided to go e85 on this thing too so I'll have a safety barrier for detonation. Most likely chunk the aftercooler in the corner though.
Last edited by prochargedmopar; 08/19/1702:25 AM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: 70's small block durability mods for 700hp
[Re: Prochargedmopar]
#2356568 08/19/1702:07 PM08/19/1702:07 PM
Keep the intercooler and get the jetting correct for that You can't get the fuel air inlet temps to cold, ever
The intercooler I have is a Procharger 3" that has a 700hp rating. I figured with e85 it would cause a couple (at least) psi drop being my goal is 750ish hp.
I also thought that the high octane e85 would not require any intercooler at all for the low boost levels I'll be running to meet my power levels. 12-18psi.
Hmmmmmmmmm
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: 70's small block durability mods for 700hp
[Re: quickd100]
#2368019 09/09/1708:50 PM09/09/1708:50 PM
O-ringed the deck and use a copper head gasket along with good fasteners. The rest you've been already told. A spot on tune will definitely be needed. My mostly stock 318 went from 160hp on the Dyno to 536hp on back to back pulls. Stock 2bbl and exhaust to GT45 turbo and a 800 cfm Thermoquads using C 12. The only failure was the head gasket. I O-ringed the deck and installed copper head gaskets it has held up to 26lbs. of boost at the intake. If it See's detonation at those power levels bring a shovel and a bag. Dave
Re-reading this thread again for tidbits and just noticed you said THERMOQUAD. Do you mind expounding on the mods that were required to run boost? I have one in the big bore version on the shelf.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: 70's small block durability mods for 700hp
[Re: Prochargedmopar]
#2368094 09/09/1711:54 PM09/09/1711:54 PM
E85 doesnt need to be intercooled. Thats plenty of octane for enough boost to make 750hp.
The thermoquad setup hes referig to was an old draw through style. Youll need a good e85 blow thru carb for what your doing.
I've decided to back up on the e85 idea for a bit.
I already have a blow through carb and the cost of getting it converted, upgrading the fuel lines, and buying a new pump that can handle the added 25% increase in volume is kinda pricey.
Here is the pump I'm using but with a total of 22psi (7 base +15psi boost) it's flow is limited
First of all I have to say, depending on a used stock crank at 700hp is foolish.
Now how's it going to add up? 9.600 block, 3.58 stroke, 6.125 rods means the pistons have to be about 1.685 compression height. You said "Must be 1.123-1.125 length" which I don't understand. 4" bore pistons with a chevy pin size and 1.685 compression distance are not falling out of any trees. They're custom
a 350 chevy with 3.75 stroke and 6.000 rods needs a piston with compression height of 1.12, is that where that number came from?
Anyway, I agree with Cab that trimming the rods' big ends sounds like the right way to go.
The block can use every trick you can give it. Girdle, short fill, etc.
Good Luck! R.
Does effective volume mean the piston has a 34cc dish? Or does it include how far the piston ring is down the piston too? Maybe even total volume with standard deck height block? Does this calculation look right? Seems kinda low at 7.66 to 1.
Last edited by prochargedmopar; 09/15/1712:43 AM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
Re: 70's small block durability mods for 700hp
[Re: Prochargedmopar]
#2370893 09/14/1707:47 PM09/14/1707:47 PM
O-ringed the deck and use a copper head gasket along with good fasteners. The rest you've been already told. A spot on tune will definitely be needed. My mostly stock 318 went from 160hp on the Dyno to 536hp on back to back pulls. Stock 2bbl and exhaust to GT45 turbo and a 800 cfm Thermoquads using C 12. The only failure was the head gasket. I O-ringed the deck and installed copper head gaskets it has held up to 26lbs. of boost at the intake. If it See's detonation at those power levels bring a shovel and a bag. Dave
Re-reading this thread again for tidbits and just noticed you said THERMOQUAD. Do you mind expounding on the mods that were required to run boost? I have one in the big bore version on the shelf.
Yep I ran it on a draw though setup. I went to a blowthrough and still tried the Thermoquad but above 18lbs boost the plastic float bowl blew out.( In a box it probably would work well.) Went to a Edelbrock 600 and that carb has worked well with minor mods.
Re: 70's small block durability mods for 700hp
[Re: Prochargedmopar]
#2386414 10/12/1706:17 PM10/12/1706:17 PM