Can someone tell me the reason I shouldnt boost an NA ?

Even if you never do it

Theres something about being able to arc up the rear tyres at will thats appealing.

Also eat WRX's and Monaro's whever you want. The NA 300zx looks the part and it is quite quick for what it is. But it just falls a little short of supercar without the blowers or a V8.

Having said that, I LOVE MINE !

 

I agree.....

it is only a 3.0 lite V6. But like you said, for what it is, its bloody good. Its taken roughly 10 years (if not more) for some of the major car companies such as ford or holden to make 6 cylinder engines that make more power than the 15 year old NA zed.. But there's more to driving my zed than just the power. I love the seating position, the way it drives the way it looks, the way it rumbles...the list is endless. It may not be the fastest car on the road but it still is a mighty fine machine..

Cheers

 

you should take a look at "Maximum Boost"

by Corky Bell. that book is all about turbocharging nonturbo engines. quite a good book really, if a bit short on detail.

Corky states quite a few times that it isn't really necessary to lower compression (just gotta keep the boost to a reasonable level ~6psi). he adds a twin turbo system to an NSX (comp ratio of 10.2:1), running 5.2 psi, to take it from 268 to 390 bhp.

the other thing to remember is that final cyclinder pressure isn't the only important factor, the cyclinder temperatures are also very important. if both an NA and a TT engine (at ~3psi) see the same cylinder pressure, i'm pretty sure that the NA will have the higher temperatures. this is due to the thermodynamics of a piston compressing air quickly (of which my understanding is very vague). and high temperatures lead to predetonation which leads to death :wacko:.

 

Would 98 octane fuel be enough for

a high compression turbo car? Or would you need an extra $20 per fill up for a bottle of octane booster.

 

scottyTT put turbos on his NA motor...

it doesn't look like the tidiest engine bay but it worked for him about 4 months ago and still going strong. only a few mods - and yes he had to decrease the boost.

Don't know if this is any help to you, but he wrote an article a while ago, see below....

 

Few good attempts in the US...

Only two I think that actually managed it and I only remember seeing one dyno chart. The cost was huge and the performance less than stage 3 from memory plus a/c had to go.
From time to time you get people that reckon they can do it without losing the a/c compressor but so far Ive not seen any any results. In the end its always been far better to just do an engine swap than to try with supercharging and half the cost.

 

That halfcut was totally cooked, I was told it wasn't worth a cracker.

 

really wouldnt be using octane booster too much because of the lead content

better to use and unleaded race fuel also no one would be dumb enough to run a car everyday that requires so much costs for fuel. If detonation occurs only logical solution is to drop boost and/or timming.

 

Couldn't agree more Mark.

I have a permanent smile on my face driving the Z. I've never done that with any other car!

 

Re: That halfcut was totally cooked, I was told it wasn't worth a cracker.

The engine may have been stuffed. But if the turbos, dump pipes, ECU, AFM and all the other hardware was there. Then $1300 wasnt too bad.

Hell $1300 for the Auto alone wasnt bad !!!!!!!!!

It me cost $1000 for a changeover VR auto from the wreckers !

 

Improving an NA's performance...?

I'm in the same boat, love my NA but would like a bit more power...

I've got a beasty exhaust, and a pod filter... what else can tweak up the performance?

I think athletes call these 1 percenters...

Cheers
Bill

 

Next in line should be extractors and an underdrive pulley

than you should be running decent figures for an NA.
Check out a couple of the fellas on the Aus300zx drag list under NAs and see what mods they have done apart from this.

Jeff

 

This has been done and dynod recently in the states

A guy has strapped some stock turbos onto his NA motor and is running it at stock boost. Boosts well, no problems with pinging or any other mischief. Has recently been dynod and makes good numbers.
Heres a link to the dyno post. You can search his other posts for more details.
NA to TT conversion.

 

Old thread i'm reincarnating

But don't TT's have other niceties like oil channels the NA block doesn't have ?

 

No, Im still here with my NA after 5 years. Been plenty of thought on a newer car recently but havent found anything quite as nice as the NA beast. You may remember coming around to my house about 4 years ago in newcastle:zlove:

 

I will wave that NA flag for a while longer still

Cheers
Rob

 

I was speaking to my uncle recently as he owns quite a reputable workshop in port adelaide.

i asked him if installing a gas system on a turbo car will have any advert loss of power or lower spool he said no as they expansion of gases is what makes the turbo spool.
hes installed hundreds upon hundreds of customers with turbo cars on gas.

now since gas is around 105-110 octane you could run an N/A block with turbos at much higher levels of boost than you would be with normal unleaded.

theres a thought quick spooling instant power, fuel efficient gas zed.

 

bit of a discussion on your options here:
http://www.automotiveforums.com/vbulletin/showthread.php?t=283043

go the V8. :]

 

Wow, A post back from the archives !!!

 

The NA block is exactly the same as the TT block. Only the oil squirters and oil pump are different which are bolt on anyway.