layton108

if i wanted to get a little bit more out of my motor and was looking to upgrade the throttle body would i be looking to swap one from a newer 928 like an s4 or would i be looking for aftermarket? and also would there need to be anything done tuning wise to compensate for the extra air flow?

mark kibort

air flow is easily regulated by the AFM or MAF. are you talking 2 valver?
if so, find a euro intake with throttle body.

which car do you have?

mk

layton108

honestly i dont know which model i have all i really know about it is its a 1980 928 i know there where different versions of it but not sure how to tell which one i have

Jfrahm

You need a cone filter, a bigger MAF, a 90mm throttle body, an engine grounding kit and some of those resistor chips from ebay. 20+20+20+5+35hp = 100HP gain. Oh and bigger injectors, an adjustable FPR, a grapefruit-sized exhaust tip, a tornado, splitfires, engine rebuild pellets... what'd I miss?

Seriously though, hunting up a Euro S or early 32v 928 is the cheapest/best way to get more HP.
-Joel.

brutus

Are you by chance related to Danglerb ?? You just bought a car which on a GOOD day puts down about 200 HP to the rear wheels ! it is a 270 cubic inch V-8 with a speedometer which reads to 85 MPH that should tell you something. Besides none of the later intakes fit and there are no aftermaket intake parts.

mark kibort

you need the euro intake and euro cams. (and headers) this will give you 40hp)

or, you can do a NOS system for 50hp.

mk

rixter

now that wasn't very nice...
there are plenty of ways to get more hp out of these cars, the 85mph speedo was a DOT thing NOT an indication of how fast the car actually is
I second the euro top end upgrade, Jack is putting about 300 to the wheels with EuroS heads/cams/some headers and an x-pipe and he has an 81

hacker-pschorr

Sure about that? Without knowing how much he paid for the car and the condition you cannot say that.

Supercharger kit will be $5k, with more power than either the Euro S or the 32V.

With supercharged US 16V 928's making 350-400rwhp, the attitude of selling them off for a Euro or 32V is very much a thing of the past.

layton108

what year euro would i be looking at if i wanted to upgrade?

mark kibort

later year 2 valve euro intake with throttle body. (need fuel injector type found only on 84 and later euros) heads and cams can be any year euro.

mk

Jfrahm

I think either the supercharger or euro top-end upgrade, headers, X, etc. will cost more than the $3-$4K that it would cost to switch to a similar condition Euro S or 32v 928s, and a great deal more if labor is not 'free.' Time and trouble wise, a factory car with the HP you want is a bargain.

There have been some great deals on 85 and 86 32v 928s. I really like those cars. Cool taillights, small wing, light weight, 4-speed auto or solid 5-speed, respond well to a chip...

Plus if you want more HP in the future you have somewhere to go. Stroker, supercharger, etc.
-Joel.

AO

NOS! For less than $1k you can have a really nice NOS system that will give you 100HP... and it will be safe!

hacker-pschorr

It's not apples to apples since a supercharged US 16V makes more power than a EuroS and most 32V's. Carl's supercharger kit is under $5,000 for a 16V, makes around 290rwhp.
Add an intercooler, some more tuning & more boost (pullies are cheap) you can hit 350rwhp pretty easily. This is far more than any 32V 928 in a lighter car.
The factory never came close to the HP I want.

Even the owners of 32V and EuroS 928's are looking for mor power.
The US 16V cars give you a nice base with a low entry level cost and low compression for boost.

As Andrew noted, NOS is very cheap compared to everything else, makes good power.

Imo000

Isn't it too early to tell if the 400rwhp US 16V can handle this for an extended preiod of time?

hacker-pschorr

No