924Board.org

[hawkman]

hi guys, just wondering, what other cylinder heads would match up to a 924 block, i know the 931 head matches up, but the combustion chamber is in the head so it drops the compression ratio. do the 944 or the 951 or the 924S cylinder heads match up?
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'81 924 n/a "The Baby" Modified!!!!!
'93 3000GT VR4 "Un-Touchable"

[My924gtc]

This would be the best option goin right nowhttp://www.924board.org/viewtopic.php?t=11059

Catch up with that thread and PM me if you are interested.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[hawkman]

seems that, that thread is about a company reworking a 924 Head? i am going to already rework any head i put on the car, i know the 931 Head flows better then the 924 head, and i know the 944 and 951 heads flow even more, and then the 968 head is a beast, but i was questioning if the heads would fit the 924 block, im going to have any head i get ported and polished and CC'd and flow tested, and then have over sized valves put in place and have the engine blue printed and bored over.
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'81 924 n/a "The Baby" Modified!!!!!
'93 3000GT VR4 "Un-Touchable"

[My924gtc]

OK, then to answer your question directly...NO.

None of those heads will work on your 924.

No there are no known heads that will bolt onto your motor and increase performance.

The 931 head will work, but you will need custom pistons, just as a start.

Almost 25 years of interest in trying to achieve the same desired result, using big valves and P&P, bla bla ....and nothing.

Good luck with your endeavor nonetheless.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[hawkman]

the new piston idea is if i wanted to make it or keep the compression ratio that i have. this isn't a daily driver, my VR4 is my daily driver, i haven't decided which avenue im going to go down yet, im either going to dropthe compression ratio as far as i can go, and make the car Forced Induction either a Super Charger/Turbo Charger or im going to make it a interferance motor and raise the compression ratio as high it can go. i will be converting to a timing/spark controler like a megaspark / MSD type system as well as a EFI system either a megasquirt or a custom fab'd unit ... so in short, the 931 head is the only option.
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'81 924 n/a "The Baby" Modified!!!!!
'93 3000GT VR4 "Un-Touchable"

[My924gtc]

For all that loot just buy a low mileage 968 motor and trans and keep it Porsche through and through.

Yeah, don't forget if you are going top add gobs of power to your 924 you WILL be replacing the trans too.

As I said, I wish you luck and I would love to hear how it turns out.

Then again I suspect we will be hearing alot from you throughout this journey.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[hawkman]

haha yea im not doin a transplant, just dont feel like doin that.... and im not goin to get a 944 engine or get another car, this is just a nice project dont know how much power ill get, but hey, i got my AWD monster thats daily driven so its all good
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'81 924 n/a "The Baby" Modified!!!!!
'93 3000GT VR4 "Un-Touchable"

[Robert Hooper]

Hawkman,

Go for the modifications that you are proposing and dont let anyone tell you not to, at the end of the day if you have the money and want you car to go faster go for it,

My924gtc,

Why would you suggest so strongly that this guy not modify his car when you are so willing to belive a engine tuner in england can produce a better head without seeing any proof, I have been following the 'new head' thread since the start and all i have seen is a guy blowing wind out his arse with no proof, he says that he can get 140 hp with this great new head no problems, but i have been getting 138 hp from my race car for years with only a mild port and polish, be very careful your not getting ripped off, ask for dynos......I bellive that you should be supporting people like hawkman after all if he spends the money you may acually get some benifit from what he learns......

Anyone else reading this reply, the 924 is an underpower little car but it a hell of alot of fun, Im really getting sick of contiually put down of any new ideas relating to this car, for gods sake if the factory could get nearly 400hp out the engine with 20 year old technology why cant we get 300hp out of our cars cheaply
with current technology.....

Rob
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1982 924 Race Car
1981 931 Road Car

[Chrenan]

Rob,

You make a good point about the modifications some guys have been running for years. I'd like to see the HP and torque stats on a car with a port and polish head, stage 2 cam, weber throttle body and euro pistons as this is the rebuild setup I am planning on going with for the spare engine I have.
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1987 951 - M193 Version for Japan

[My924gtc]

Rob---I don't think you have a point.

The guy asked what heads will work on his 924 and the answer is none of them. The 931 one will work, and the D-Production race cars are proof of that, but not without serious modification to the internals of the motor and carbs.

If you think you are doing him a favor by telling him to throw money at it, think again.

Hey Hawkman, ask Applebit how much money it takes to get a reliable modified performance motor out of you current engine.

As a matter of fact, ask Rob's buddy Derek who has spent a ton of money only to accomplish a whopping 145 hp.

Hawk--I have a 140hp motor, if you want it I'll save you the trouble and sell it to you for the retail cost of all the mods you were thinking of doing to your motor. And after you pay me, I'll take the money and build three more just like it.

Sorry but Rob caught me on a bad day.

Hawk---As I said before, I look forward to hearing how things go for you and the results you come up with.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[Robert Hooper]

I agree derek spent lots for his 145

I spent heaps on my 138 (to get reliable race engine)

but the 924 engine isnt really the reason its a great car, it stops great and goes round corners great....

Im just beinging to read the posts lately and they are getting very negative,

i belive that it is possible to do anything with a car if you have the money, hell lets make new twin cam heads and mould them...i know unreliastic but if some one wins lotto

any way , ithink you caough me on a bad day as well, just be careful shelling out money to that bloke in england till he gives you dyno prints etc and probally vidoes and pics of what has been done. i just dont like what he is going on about, heaps and heaps of talk and no proof

if he is really a business then they would have finsihed the product and then released it normally, i understand he is doing maket research, but there is a point where he has to show his cards

I will try and find my last dyno print to show u what i have comming out of a relativly standard engine

Cheers

Rob
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1982 924 Race Car
1981 931 Road Car

[My924gtc]

Rob,

I got you loud and clear on the UK dude. There will be no $$$ until the proof is provided.

Give me 10 minutes on power point and I can produce a dyno chart that will blow your mind. Does'nt mean it is real, and I know that is why you are mentioning video.

The longer he takes to provide info, the more we are leaning towards getting a head up front and I will test it myself. Then I can effectively back up the BS he's spewing.

Thanks for lookin out though.

If I hit the lotto I will bribe Porsche to cough up all the specs, molds, and information so we can all have 375 hp GTR motors to play with. And I'll give everyone with a 924 one as a x-mas gift.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[My924gtc]

Rob,

I got you loud and clear on the UK dude. There will be no $$$ until the proof is provided.

Give me 10 minutes on power point and I can produce a dyno chart that will blow your mind. Does'nt mean it is real, and I know that is why you are mentioning video.

The longer he takes to provide info, the more we are leaning towards getting a head up front and I will test it myself. Then I can effectively back up the BS he's spewing.

Thanks for lookin out though.

If I hit the lotto I will bribe Porsche to cough up all the specs, molds, and information so we can all have 375 hp GTR motors to play with. And I'll give everyone with a 924 one as a x-mas gift.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[My924gtc]

Rob,

I got you loud and clear on the UK dude. There will be no $$$ until the proof is provided.

Give me 10 minutes on power point and I can produce a dyno chart that will blow your mind. Does'nt mean it is real, and I know that is why you are mentioning video.

The longer he takes to provide info, the more we are leaning towards getting a head up front and I will test it myself. Then I can effectively back up the BS he's spewing.

Thanks for lookin out though.

If I hit the lotto I will bribe Porsche to cough up all the specs, molds, and information so we can all have 375 hp GTR motors to play with. And I'll give everyone with a 924 one as a x-mas gift.
_________________
MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[wdb]

you cant get more power using the same (stock ) parts . finding what parts might work for the better is really hard . first speculate on what might work then (this is the hard part ) track down the specs . personally I believe one of the 16-20 valve VW/AUDI heads will work , as well as the 95.5 mm diesel crank to make a 2.4L 20 valve super charged engine for about $!K . the problem is none of us can afford to spend !K to try it .

whats needed ,more displacement ,better breathing and some boost from idle up .I've suggested a group effort (see " how about a raffle " post ) but was ignored . 50 people give $20 or 25 give $40 should do it . my idea was to buy the crank to se if it'll fit ,if so use it ,if not sell it on ebay for a (hopefully )small lose .then stroke a 924 crank to 2.4L . then buy a 20 valve VAG head and try it , sell it if not . then add that $300 homemade supercharger . and if an engine is completed , raffle it to the participants . if nothing works out give back whatever money is left . small risk ,potential gains , we'll know what works or doesnt . could prolly do it for less by buying 1 item at a time , what would be the most costly item ,the head $199-$400 on ebay ?

someone could donate a block ,then have a machine shop assemble to avoid any newbie errors . together we could do this . the hard part will be finding a Volunteer to to do the leg work ,order and gather the parts and assebling details .