PSI 8.8L big block

[idahovette]

I'm bettin' that ain't NO "fuel pincher".........

 

[bucket]

I'm bettin' that ain't NO "fuel pincher".........

I believe it drinks like a fish.

 

[Jrgunn5150]

I'll bet it's not significantly worse than the 15 mpg the current 6.0 gets.

 

[TotalyHucked]

Very true, it won't be working hard. AT ALL.

 

[bucket]

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That picture there shows how much better the manifold inlet is, compared to the 8.1L.

 

[Frankenchevy]

What are the hp/tq figures stock on something like this?

Long time no see, btw.

 

[65Custom]

My understanding of these 8.1 & 8.8, is there are NOT a lot of after market parts out there for them and what is out there is expensive. I understand there is one company that does make parts for them, supposedly they are reliable engines, but getting aftermarket parts can be an issue. This coming from my friend who works at a restoration shop and does a lot of engine swaps he told me they just avoid anything with 8.1/8.8 or they use the old Gen blocks

 

[bucket]

My understanding of these 8.1 & 8.8, is there are NOT a lot of after market parts out there for them and what is out there is expensive. I understand there is one company that does make parts for them, supposedly they are reliable engines, but getting aftermarket parts can be an issue. This coming from my friend who works at a restoration shop and does a lot of engine swaps he told me they just avoid anything with 8.1/8.8 or they use the old Gen blocks

You are very correct. It's all in what the intended use is. If you want turbo diesel like grunt, along with features like multi port injection and coil-near-plug ignition and the stock power levels will be just fine for what's needed... then it's a great choice. (Although they probably respond very well to boost)

But if you want something to hop up with cam, heads, intake, etc... then a traditional big block is likely a better choice.

 

[TotalyHucked]

Yeah for their purpose, they're a great engine. One of our guys here just got his squarebody dually 'burb up and going with an 8.1/4L80 swap and loves it.

 

[Craig Nedrow]

Lots of differences from my Mark lV, I think it will be easier seal with the flat surfaces, and FI is great. Interesting lifter locating for the roller lifters. Here is the old style lifters, I have since switched to Johnson. AFR heads on my build, and E-brock airgap, Wiseco pistons, Manley rods/W arp2000 bolts, Eagle crank, Studs on mains, Arp bolts for heads. Have about $9500 into it so far. Last two for reference, the original 454.

 

[Craig Nedrow]

Original machined block was a complete, from a 1976 motorhome. What a difference in the 8.1/8.8!

 

[Craig Nedrow]

more

 

[idahovette]

What outlet did you get your cam and lifters thru @Craig Nedrow

 

[Craig Nedrow]

Hey Perry, there are a few, I went to johnson direct, but they were out. They sent me to a guy on the east coast that is into building boat engines, and he had them in stock. go here: https://johnsonlifters.com/Products/Hydraulic-Roller-Lifters
Ph# 1-800-860-4233. Part # for mine were 2126bbr-16, so these were the .300 tall, reduced travel, .093 axis oiling, bbc tie bar set. Pre load is .035 +- .01 inch. $ alert, they are expensive, and in retrospect, I should have gone with solids.

 

[Jrgunn5150]

My understanding of these 8.1 & 8.8, is there are NOT a lot of after market parts out there for them and what is out there is expensive. I understand there is one company that does make parts for them, supposedly they are reliable engines, but getting aftermarket parts can be an issue. This coming from my friend who works at a restoration shop and does a lot of engine swaps he told me they just avoid anything with 8.1/8.8 or they use the old Gen blocks

This is always the thing people bring up lol.

1. Again, it's not an 8.1. Forget all about the 8.1, put it right out of your head, as different from this as a peanut port TBI is from an LS5.

2. When you have 540 cubic inches, an all forged rotating assembly, factory roller cam, roller rockers, beehive valve springs, heads that flow 290 cfm untouched... What part of that do you need to improve upon to go fail your way to 500 tire on 87 octane gas?