Boxster V8

[mikeman]

FWIW, if I was going to do the v8 swap, and was on a budget, I'd be looking at a used/refreshed L33 aluminum 5.3 with an LS1 intake and a/m cam. Should be about 400hp, and nowhere near as expensive as an LSx. With the Renegade mounts...


Hmm.. actually that sounds like a good plan.

[Pdwight]

2005 Chevrolet 5 3 L33 Vortec Engine with Computer and Wiring LS1 LS2 LSX | eBay

Less than 350HP

[mikeman]

Originally Posted by Pdwight

2005 Chevrolet 5 3 L33 Vortec Engine with Computer and Wiring LS1 LS2 LSX | eBay

Less than 350HP

yeh stock...
good little thread over here:

L33 5.3 na performance build recipe - LS1TECH

Here is my aluminum 5.3 build:

18K mile 2007 LS4 (aluminum 5.3 w/799 heads): $1000 for engine transmission/harness/ecm.
LS7 MAF: $60 for sensor and pigtail
LS2 TB, Intake, & Injectors: $375
224/232 DoD camshaft, springs, pushrods: $750
LS7 exhaust manifolds: $150
Reworked stock harness: $50 (for pins and heat shrink)

Never pulled the heads or did any porting, just bolted together and tuned.
So $2385 for the basics, or $1810 after I sold the transmission for $575. Best part is when I break it, I can just get another LS4 engine, swap over the parts and do it again. Resulted in 382whp at 6800 rpm and 335 wtq at 5000

and CarCraft..

Dyno Numbers
Test 1 was the baseline test for the stock 5.3L with a GM Performance Parts single-plane intake manifold, a Holley 750-cfm carburetor, and a set of Hooker 13/4-inch headers complete with a 21/2-inch exhaust system and Flowmaster Super 44 mufflers.

Test 2 was the same engine with the only addition being the Comp Thumper hydraulic roller camshaft.

*snip*

TEST 2
peak HP 433@6800rpm
peak TQ 381@5400-5600rpm

Read more: 325 Chevy Small Block Engine - Bolt On A Cam And Heads And Add 120+HP - Car Craft Magazine

[Pdwight]

That sounds as antiquated as a 8-Track player...Fuel Injection would be the only way to go IMHO

[mikeman]

Originally Posted by Pdwight

That sounds as antiquated as a 8-Track player...Fuel Injection would be the only way to go IMHO

Of course..
for engine dyno testing purposes, as in the article, it keeps it simple and repeatable.

[jb92563]

I like where this project is going and it may just make those rollers worth a bit more with a nice power boost as well.

I have an S and think that by the time you get this all worked out, I might want to consider this option as the engine ages and needs major repairs.

The plug and play wiring and tranny connection aspect is very good.

If you can get the price around $6k or less I think you will have a real winner as all the aging Boxsters start looking for new engines.

I'm curious now and looking for info on this engine and found this:
http://www.clubgti.com/showthread.php?244292-Audi-32v-4-2l-V8-engine

Of Note: Lower Reving ~6800? , Good torque midrange

[Pdwight]

Originally Posted by jb92563

I like where this project is going and it may just make those rollers worth a bit more with a nice power boost as well.

I have an S and think that by the time you get this all worked out, I might want to consider this option as the engine ages and needs major repairs.

The plug and play wiring and tranny connection aspect is very good.

If you can get the price around $6k or less I think you will have a real winner as all the aging Boxsters start looking for new engines.

Totally agree, at 5K or just under it becomes very very attractive...350HP would be plenty for me....my mostly stock S has enough power for me

[chromecarz00]

Any updates on this? Really interested and could use it, yesterday.