3800 Help please with my whipple ax140 engine build

[GTPpower]

When I bought this Whipple kit, it came with lots of extra parts. Some I'll use, most will just get sold.

However, I'm looking for advice on the engine. I know a stock bottom end is likely strong enough, but it is also my opinion that a 500hp supercharged setup is harder on the bottom end than a 800hp turbo setup. With an expensive blower, intercooler, and heads, I would rather not risk it.

I have a set of aluminum heads I'm planning to use, but I'm not sure what headgaskets to go with. ?

As for the bottom end, I have a l32 engine that needs a piston, and probably a hone. My thoughts are to use the stock l32 rods and machine the rods for arp bolts. Bore the block .020" over, align hone the mains, do James' oiling mods, arp main studs, but what about pistons? I have a new set of JE diamond 8.1:1 pistons, but my gut tells me I should really bump the compression since the Whipple produces so much heat.


Lastly, how about the cam? Should I stick with the xpz, or go to thr is3 or is4, or maybe go with something completely different?

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[10sec]

I would just run it with a stock bottom end, turbo cars make a TON of TQ and don't toss rods. XPZ should be more cam than the heads can flow anyways, keep it the same. Don't over think this setup, it's really just math, it can only make what it can make.

 

[sktchy]

I think experiment with a 100 dollar stock pullout. It's not like it's gonna wreck the blower if it tosses a rod.

 

[bs009]

I agree about a supercharger being harder on the bottom end but I don't think it's as bad as a 500hp/800hp difference, if a supercharged engine needs 20% of its power to drive the supercharger then a 240hp supercharged engine is really making 300hp in the cylinders and 60hp is lost to drive the supercharger. A 500chp supercharged engine is probably making close to 600hp. At least that's the theory, but I know a supercharged engine could make a lot more cylinder pressure down in the low rpms.

If you're still stuck behind a 4t65e there probably isn't much point in going with a stronger than stock L32/L67 engine. If you can get a better trans in there though then I would just spend the couple hundred extra dollars on good rods too and have a pretty bulletproof engine. If the aluminum heads are ported you should be able to get as much out of any cam that want right?

Camshafts

3800wiki.com

I'm jelly about the aluminum heads haha! Really interested to see what you end up doing

 

[sktchy]

I say trash a stock bottom end sorting the bugs out and then have this badass engine built and set back to throw in it after. There's always mishaps figuring out a new setup and why risk all that money and work right off the bat?

 

[GTPpower]

I really can't find any decent engines. The best I can find is a 138k mile l32 for $1000 in Minnesota, which is part of the reason

I suppose I could just get a new piston for my l32, but that engine hasn't ran like 12 years, and it's been sitting most of that time uncovered without a head on one bank.

 

[GTPpower]

I'm also not too interested in breaking a ringland and destroying a head or sending a chunk of piston into the intercooler/blower.

 

[sktchy]

I just passed up a 130k l26 for 150 bucks in Lincoln. I'm staying away from the little rods.

 

[sktchy]

I'm pretty sure you can get away with piston slapping that block if it's not rusted up btw, if I got the abomination I threw together on the floor to run hard surely you can make gold with the same scenario.

 

[Turbocharged400sbc]

Stockr you're going to be fighting enough stuff as is.

Delete the Boost bypass if it's not the prj post-core bypass

 

[GTPpower]

It is the prj version.

 

[Turbocharged400sbc]

Well now don't go all gettin your giant swinging dick caught closing yer car door.

Are you sure it's a 140 ax and not a 2300? One is American Whipple in ci and the other is the Lysholm heap

 

[GTPpower]

Well, I'm pretty sure it's a 140. I think.















 

[v6buicks]

It sounds like you have no intentions of skimping at the machine shop, so I'm sure any way you choose will work fine. If I ever trash my L36, I'd probably have it rebuilt with nice rods and higher compression pistons as well. It sucks that the good cheap pullouts are getting to be such a gamble. The other option I consider is buying an entire running but rusty GTP to part out.

 

[GTPpower]

It sounds like you have no intentions of skimping at the machine shop, so I'm sure any way you choose will work fine. If I ever trash my L36, I'd probably have it rebuilt with nice rods and higher compression pistons as well. It sucks that the good cheap pullouts are getting to be such a gamble. The other option I consider is buying an entire running but rusty GTP to part out.







Yeah, it sucks. I've bought a lot of good low mile supercharged engines over the years, but it's been a few years since I have seen a good deal on one. And they all have super high miles anymore.

 

[GTPpower]

What the hell is wrong with this app? My phone keeps messing with the placement of text and moving it around?

 

[Bake82]

I have specs from a PRJ cam around somewhere, I can find if you're interested. Was for the MP112 build I had parted. I don't have the cam anymore (Jeff Kuntz bought it) but I can try and find the specs if you'd like.

 

[sktchy]

What the hell is wrong with this app? My phone keeps messing with the placement of text and moving it around?

Install Google keyboard or turn your grammarly extension bs off. Just went through this yesterday.

Also it sucks that most of the pullouts aren't worth a shit so if you trust your engine guy then that route is probably best.

 

[GTPpower]

Install Google keyboard or turn your grammarly extension bs off. Just went through this yesterday.

Also it sucks that most of the pullouts aren't worth a shit so if you trust your engine guy then that route is probably best.

Well, I'll try turning it off for this app and see how that works. So far so good. Thanks!

 

[Turbocharged400sbc]

So uh this thing gonna be upside down?

We've confirmed we have two good 2300ax headunits....so I r curious

 

[GTPpower]

I don't think upside-down. I will just use the prj/animul intercooler for starters, then might grab an aussie a2a plate and send the air through my 1500hp a2w core. Kind of depends if I get tired of belt slip or not. Maybe you could water jet me a cog drive.

 

[Turbocharged400sbc]

You mean like this dmr 30mm cog drive stuffs fer whipples?

 

[GTPpower]

You mean like this dmr 30mm cog drive stuffs fer whipples?

View attachment 167519

Almost like that, just a zip code change.

 

[Turbocharged400sbc]

That 10inch dia crank pulley thankfully clears the chassis rail...... as it is biiiiiig

 

[GTPpower]

I kind of have one of those.



#lingenfelter gtp