Hey I was talking to my friend about building a 300HP N/A L28 then he suggested that instead of building one I build 3+ of them and keep on then sell the rest.

So I'm seeing if anyone would have any interest in them? Their going to be balanced, decked heads, proper cam shimming and overbored to start. then then head will be gasket matched and ported with unshrouded possibly larger valves.

I have no idea what these will cost as of yet but so far they dont look to costly I wouldn't say more $3000 more then likely. possibly cheaper as there are just to cover the cost of labor and parts for everything. and more engines build the cheaper they will get to a point.

so if there is a market for them I'll build them and sell them. if not then I'll just slowly build my one.

EDIT: And dont tell me its cheaper to do an engine swap as I really dont care. This is for the people like me that actually likes the L engines and wants to keep their Z looking "stockish" lol

 

How are you planning to get 300hp out of the N/A? and is that at the crank or the wheels?

 

Not sure yet but probably at the crank maybe the wheels if I get lucky. and I'm not going to go into details tho

 

300hp, N/A L-series, you're looking at about $7-10k a pop, seeing as a measly $3k wouldn't even get you a stroker.

 

Im just asking because I build L's and Im curious on the plans


Ill tell ya right now your going to need a **** load of very well done (professional) head porting to tap into that power



Ill be happy if my L28 with done tops, and ported E31, and ITB's on meth/water puts down 200 at the wheels.

 

Well my friend has been building race motors for a long time And he says thinks this shouldnt be to hard. So we will see lol

And to be honest the plans are still up in the air as my friend and I work out all the final details of the build. I'm just wondering what everyone thinks of the idea.

And hoov I really doubt that. lol

 

do you plan on leaving the stock crank and bore?

 

A properly built mild stroker motor is going to run about $5k doing everything yourself. I take it through all the "race motors" your friend has built he has never researched the L-series? Unless you are running some serious displacement, or turning some serious RPM you are not going to turn over 250 at the crank.

 

Stock crank but with an over bore.

And idk, he just build a long rod stroker V8 and is selling it for $3K. and hes build a few L engines he said. and I'm not making a stroker L28.

I'm not saying that it might happen. But I'm working out the details of the build with him. and if we managed to build it would there be a market for them if I built more. thats what Im asking. IM NOT ASKING IF ITS CHEAP OR POSSIBLE FOR ****S SAKE.

 

Im looking at it from a builders point of view

 

Nobody is implying that you asked if it's cheap to build, but you said "but so far they dont look to costly I wouldn't say more $3000 more then likely" and I responded "300hp, N/A L-series, you're looking at about $7-10k a pop" then you said "And hoov I really doubt that" and I said "A properly built mild stroker motor is going to run about $5k doing everything yourself" Parts alone are going to cost about $2500, let alone all of the machine work

 

I see. Wells a few things playing into this I'm also not telling. my machinist friend wants to build one of these for his air plane to start with already and he has enough tools to forge his own pistons if need be. So some parts are already on the low side and so his machining costs. Which that also he also has all the proper tools to unshroud valves and port/gasket-match heads and polish them up. Sense he also has connections around with other machine shops we ca get everything raced balanced for much cheaper then you normally would see.

So basically. We both want to build one. and were both wondering if we build more then 2 engines. would anyone buy them to help cover the cost of building all of them?

 

I build all my engines so Im more interested in how yo u plan to get 300hp than buying one

 

One word: REBELLO.

Do what they do, and you'll have 300whp.

Also... I watched this today (rev's past 8k????): http://www.youtube.com/watch?v=U3DZD...eature=related

 

When you have a complete machine shop at your finger tips and know what you are doing, things get crazy. He's nowhere near the limit of piston acceleration though, after what he did to those pistons.

And I second what nismo said about Rebello, I've seen a few Rebello motors in action at willow springs and they are absolutely top notch motors, same goes for ed pink, bill loe and jim grubbs.

 

If you can port a head like Dave (Rebello) or Paul aka BRAAP (Rusch Motorsports) then your in business,
if not... you woulnt make that much power. period.


both these guys have been at Z's for over 20 years and know there ****

 

Yeah, the head is where it's at for the L-series.

 

Well we will see what happens then.

But Everything aside. I just want to know this;

Will people buy a reliable 300HP L28 motor for around $3K? Or not?

 

Man I would, if I had that kind of money to throw around. I would love to have a built up n/a for my slicktop. I am sure there would be people, interested in the engines. If you actually succeed like you are saying. Good luck on that, and keep us posted.

 

Thanks, if I do manage this everyone at ZDriver will be the first to know!

 

I loled.

 

A reliable, cheap, 300hp NA L28 is an oxymoron.


Not sating it wont happen but its going to be a streeeeeeeeeetch.

 

Yes! I would if you're willing to sell it to me at that big of a loss.

 

Same here!

 

No offense blue, but i have read many of your posts and idk if i would want you building one of my motors. That being said, 300hp is the PEAK of these motors in an NA form and robello has to charge people over 10k to stay alive, you expect to do it and make profit of some sort for less than a 1/3 of that? never going to happen, and like all stated above, the head designs on these cars SUCK, pre-ignition/detonation and flow like ****. the head work alone will cost you 3k.

and as for your so called friend building one of these for his "airplane" lmao! I'm a private pilot, IFR rated, working on my commercial and go to school for airplanes, and first off, NO ENGINE OTHER THAN ONE FAA APPROVED AND TESTED can go into any REAL AIRPLANE. they are extremely strict on those rules and every part in that plane has to go through the same certifications and regs. also no one would use an inline motor, horizontally opposed is used to help with rotational forces expelled on the aircraft and balance issues.

There are certain cases where you can use automotive engines in light sport experimental aircraft, but other than the old H-4 from a suby or VW that are common it the ultra-light category but are rebuilt to airplane specs, or the occasional small block 350 used in the scaled down version P-51 kits tho im not sure what that entails, everyone else, aka the smarter and richer people use engines built by lycoming, or rotax etc...

i don't see why anyone would use an inline, overweight, underpowered engine in anything meant to fly....

a big big issue is how airplane engines work, any direct drive prop is situated right on the crankshaft of the motor, so these motors have to operate at their PEAK hp/tq output below 3000 rpms typically, otherwise the outer tips of a 4 foot long blade can start to break the sound barrier which is NOO BUENO! prop will shatter, the vibrations will rip apart aircraft. engines that are used and operate at higher RPMS to make power mount the prop on a CV style trans (not a car trans this works in an opposite manner) (called a constant speed prop) and then you can vary the pitch settings.