Stock engine vs fully built engine

Magnum PD · Sep 6, 2015

Mainly for discussion sake I guess, if you take an engine like Pontiaccross that had a stock bottom Pistons weren't taken out no block fill or girdle, didn't have headers did he?
Then you take an engine like isootmypants that had everything done to it internally Pistons, headers, ported and polished- all the fixins.

I wonder what the biggest differences will be. Throw out block flex and weak rods and so on. How much HP can be freed up with internal mods.

Main reason I ask is because a truck that had 400/400's and a S400 turbo should have done better than it did. Was it because he had a stock bottom end and just add on's?

1badpsd · Sep 6, 2015

Not a 100% sure what your getting at but my scsb put down 696 with 3/2's and a stock bottom end

Magnum PD · Sep 6, 2015

Things like a stiff block that doesn't warp, anti friction skirts, ported heads, headers, that type of thing.

Jomax · Sep 6, 2015

That engine could've just been tired. Low compression?

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Magnum PD · Sep 6, 2015

I got a video.

m.59C20785-AB7E-4AFE-B046-8485FBBD0161_zpsdca1zv4u.jpg

02BigD · Sep 6, 2015

Is the question, how much hp can be had with a cam and ported heads?

Magnum PD · Sep 6, 2015

And less restrictions? Higher rpm's?

bluedge8 · Sep 6, 2015

video didn't work, but did isootmypants just blow a motor?

cbf9703 · Sep 6, 2015

02BigD said:
Is the question, how much hp can be had with a cam and ported heads?

Magnum PD said:
And less restrictions? Higher rpm's?

Swamps testing a few years back on porting and cams across different fuel and turbo combos put out some numbers, but I know things have progressed since then.... Sounds like you're kind of asking along those lines?

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Magnum PD · Sep 6, 2015

bluedge8 said:
video didn't work, but did isootmypants just blow a motor?

Hasn't been on since August

I don't have luck loading videos.

DocBar · Sep 6, 2015

Magnum PD said:
Mainly for discussion sake I guess, if you take an engine like Pontiaccross that had a stock bottom Pistons weren't taken out no block fill or girdle, didn't have headers did he?
Then you take an engine like isootmypants that had everything done to it internally Pistons, headers, ported and polished- all the fixins.

I wonder what the biggest differences will be. Throw out block flex and weak rods and so on. How much HP can be freed up with internal mods.

Main reason I ask is because a truck that had 400/400's and a S400 turbo should have done better than it did. Was it because he had a stock bottom end and just add on's?

Is this even a serious question?

Magnum PD · Sep 6, 2015

How about if Pontiacross had a fully built engine WITH everything else he had, how much better or more HP would he have gained?

Somebody needs to find out if isootmypants engine is ok

DocBar · Sep 6, 2015

Magnum PD said:
How about if Pontiacross had a fully built engine WITH everything else he had, how much better or more HP would he have gained?

Somebody needs to find out if isootmypants engine is ok

Fully built is always better. It does matter who fully built the engine. It also helps to know who's tunes were on which engine. Cylinder pressure and low-end torque play crucial roles in what lives nd what doesn't.

02BigD · Sep 7, 2015

bluedge8 said:
video didn't work, but did isootmypants just blow a motor?

As mentioned, TJ hasn't been on here for a while, so we have no info there. The video was of an obs pulling, so it wasn't TJ's truck.

DocBar said:
Fully built is always better. It does matter who fully built the engine. It also helps to know who's tunes were on which engine. Cylinder pressure and low-end torque play crucial roles in what lives nd what doesn't.

Exactly. There are so many variables, it makes it difficult to simply state setup xyz will give you xxx hp and last.