FYI: went and looked at this 1988 924S (see post #38 for update)
#16
Drifting
Join Date: Jul 2009
Location: Caraquet-- New-Brunswick-- Canada
Posts: 2,728
Likes: 0
Received 3 Likes
on
3 Posts
![Smile](https://rennlist.com/forums/images/icons/icon7.gif)
lol @ engine replacement
i discovered today how awesome the 924 is. and the 924S is a raw little machine...much more of an old school car than my 951, that's for sure. i really want a 924 now...and i've seen much debate about which is better: 924S or 1980+ 931. i don't know the answer.
here, i found this.
i discovered today how awesome the 924 is. and the 924S is a raw little machine...much more of an old school car than my 951, that's for sure. i really want a 924 now...and i've seen much debate about which is better: 924S or 1980+ 931. i don't know the answer.
here, i found this.
#17
Three Wheelin'
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
hmm, well i hate to ask the dreaded question but here it is:
how much hp is achievable in a 924S or 931 with relatively simple modifications? for example, i have read somewhere on this forum that the stock turbo + powertrain in the 931 can handle 1 Bar of boost?
ps: those martinis are so awesome! i want that stripe!
![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
ps: those martinis are so awesome! i want that stripe!
Last edited by bonus12; 01-19-2011 at 11:41 PM.
#18
#19
Burning Brakes
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
hmm, well i hate to ask the dreaded question but here it is:
how much hp is achievable in a 924S or 931 with relatively simple modifications? for example, i have read somewhere on this forum that the stock turbo + powertrain in the 931 can handle 1 Bar of boost?
ps: those martinis are so awesome! i want that stripe!
![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
ps: those martinis are so awesome! i want that stripe!
my 931 is running 10psi, which is the euro spec. with no intercooler, a non-adjustable CIS injection, variable fuel, a small turbo and VERY basic computer controls the 924 boards advise against any more. The car's pretty peppy when on boost...I'd put it ahead of a 924s/944 in a straight line race as it's lighter with the same or more HP. Lots of turbo lag, though.
The martinis are cool but are NA 2 liter cars only...neat, but like 90hp.
#20
Drifting
Join Date: Jul 2009
Location: Caraquet-- New-Brunswick-- Canada
Posts: 2,728
Likes: 0
Received 3 Likes
on
3 Posts
![Talking](https://rennlist.com/forums/images/icons/icon10.gif)
hmm, well i hate to ask the dreaded question but here it is:
how much hp is achievable in a 924S or 931 with relatively simple modifications? for example, i have read somewhere on this forum that the stock turbo + powertrain in the 931 can handle 1 Bar of boost?
ps: those martinis are so awesome! i want that stripe!
![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
ps: those martinis are so awesome! i want that stripe!
#22
Three Wheelin'
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
i guess i am weighing the pros and cons of these two ideas: mechanical improvement difficulty vs power potential.
of course, i have always loved a turbocharger. i can't afford a 968 or a new engine for a 924/924S/931.
#23
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I loved my 924S as well, I miss it. I actually sold it to Matt Romanowski who bought it for his wife and now they are selling it. He has it for sale here, check it out as I set it up nice for both street and track.
#25
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
If you want easy power you'll need to get a 931 over the 924S. There are tons of threads on how one might get more power out of the 2.5 n/a lump and most conclude its difficult, expensive and not worth the effort.
As far a the 931 goes... $50 for a manual boost controller, $75 dollars for a boost gauge, another $20 for hose and fittings, and in a short afternoon you'll get 175hp. Many will stop there since its plenty quick at Euro Spec power levels but if you must get more... adding a "holbert location" intercooler and giving it another 2 psi boost bump will see a bit over 200hp. It'll probably cost around $1000 to get the right IC and have it fitted properly. After that you'll need to upgrade the turbo, install a wideband AFM, get a larger FMIC and deal with a lot of plumbing issues to get it right, but 220hp to 240hp ought to be doable, and still on the stock CIS. You might need to add an adjustable WUR or digital WUR to this last setup to ensure proper fueling.
There really is no comparison between the 924S vs the 931 when it comes to power upgrades. And just to be clear... besides the engine and narrow body work, the early 944 inherited most of its parts from the 931. Suspension, transmission, brakes, interior and a ton of other parts are interchangeable.
Having said that, there are many 1980 931s with 4 lug suspension and rear drums... don't buy one of these... unless you also want to add a 5 lug conversion to your list of things to do.
As far a the 931 goes... $50 for a manual boost controller, $75 dollars for a boost gauge, another $20 for hose and fittings, and in a short afternoon you'll get 175hp. Many will stop there since its plenty quick at Euro Spec power levels but if you must get more... adding a "holbert location" intercooler and giving it another 2 psi boost bump will see a bit over 200hp. It'll probably cost around $1000 to get the right IC and have it fitted properly. After that you'll need to upgrade the turbo, install a wideband AFM, get a larger FMIC and deal with a lot of plumbing issues to get it right, but 220hp to 240hp ought to be doable, and still on the stock CIS. You might need to add an adjustable WUR or digital WUR to this last setup to ensure proper fueling.
There really is no comparison between the 924S vs the 931 when it comes to power upgrades. And just to be clear... besides the engine and narrow body work, the early 944 inherited most of its parts from the 931. Suspension, transmission, brakes, interior and a ton of other parts are interchangeable.
Having said that, there are many 1980 931s with 4 lug suspension and rear drums... don't buy one of these... unless you also want to add a 5 lug conversion to your list of things to do.
Last edited by 931GT; 01-20-2011 at 09:40 PM.
#26
Team Owner
Join Date: Oct 2009
Location: one thousand, five hundred miles north of Ft. Lauderdale for the summer.
Posts: 28,705
Received 212 Likes
on
153 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
the reason i thought your post to be completely hysterical, is that not only is this TRUE, but this was also the first thought that entered my mind and probably most of the other people, and then there's the rather sublime way you put the "truth" into the fewest number of words....
![hiha](https://rennlist.com/forums/graemlins/roflmao.gif)
![hiha](https://rennlist.com/forums/graemlins/roflmao.gif)
#27
Race Director
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
hmm, well i hate to ask the dreaded question but here it is:
how much hp is achievable in a 924S or 931 with relatively simple modifications? for example, i have read somewhere on this forum that the stock turbo + powertrain in the 931 can handle 1 Bar of boost?
ps: those martinis are so awesome! i want that stripe!
![Big Grin](https://rennlist.com/forums/images/smilies/biggrin.gif)
ps: those martinis are so awesome! i want that stripe!
931... well with enough work and factory part 345 bhp as the factory did for thei 924 Carrera GTR.
924S.. That is 944 motor so not much short of forced induction or massive displacment changes.
thanks for laying it down straight... the 924S does appeal more than the 931 in regards to the fact that i'm just a backyard mechanic, but i also want to be able to improve it's power knowing that it only weighs 2700 lbs. and more power would make a big difference. i've got a 951 now but, again, i am a still a beginning mechanic so maybe a 924S would easier for me to work on until i can approach the 951. if i could improve the lbs per hp ratio in the 924S or 931, i would be a very happy man. it's sounds easier to tap into greater power in the 931 as opposed to the 924S.
i guess i am weighing the pros and cons of these two ideas: mechanical improvement difficulty vs power potential.
of course, i have always loved a turbocharger. i can't afford a 968 or a new engine for a 924/924S/931.
i guess i am weighing the pros and cons of these two ideas: mechanical improvement difficulty vs power potential.
of course, i have always loved a turbocharger. i can't afford a 968 or a new engine for a 924/924S/931.
If you want a 931 fine, but you already have 951 which is better than a 924S or 931. I have both a 951 and 944 race car. I keep the 951 stock because it has plenty of power and race prepped the 944 using many 924S parts. 924S parts cars tend to be cheaper that 944 parts cars and underskin all the parts are the same. I chose to mod and race the 944 because it is cheaper to build and maintain. It will however NEVER have the power of my 951 without an engine swap. I am ok with that and it current stock power level.
#29
Team Owner
Join Date: Oct 2009
Location: one thousand, five hundred miles north of Ft. Lauderdale for the summer.
Posts: 28,705
Received 212 Likes
on
153 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
very quick car. got one up to like, 136~137 mph. felt ok but, still i liked my '87 944S better.
didn't like the narrow plan of the car. hated the fenders, narrow wheels, and the old style interior.... V2Rocket in 3.... 2.... 1....
didn't like the narrow plan of the car. hated the fenders, narrow wheels, and the old style interior.... V2Rocket in 3.... 2.... 1....
![Cool](https://rennlist.com/forums/images/smilies/cool.gif)