Ported heads on a GTA?

Renault & Alpine General Discussion

Moderators: eastlmark, phildini, BIG_MVS, Alpineandy, Test Moderator

no avatar
User

AndyClark

Rank

Non Member

Posts

118

Joined

Sat Dec 11, 2004 11:41 am

Location

Birmingham


Has thanked: 0 time
Been thanked: 2 times

Ported heads on a GTA?

Postby AndyClark » Sat Sep 05, 2020 10:54 pm

Would this make any noticeable difference on a healthy atmo engine with John Law Holley conversion, but standard cams and exhaust?

The Holley conversion has made the car noticeably more responsive, especially engine breaking/when backing-off.
no avatar
User

AndyClark

Rank

Non Member

Posts

118

Joined

Sat Dec 11, 2004 11:41 am

Location

Birmingham


Has thanked: 0 time
Been thanked: 2 times

Re: Ported heads on a GTA?

Postby AndyClark » Sat Sep 05, 2020 10:56 pm

Engine braking ha ha.
no avatar
User

Custard

Rank

Non Member

Posts

790

Joined

Sat Oct 12, 2013 7:02 pm


Has thanked: 1 time
Been thanked: 35 times

Re: Ported heads on a GTA?

Postby Custard » Sun Sep 06, 2020 6:23 pm

It makes the car reliable and also more economical and a lot more responsive, the engine braking is no different you must have a sticking brake or something, feel the wheel hubs after a run and see if one is hotter than the rest.
no avatar
User

AndyClark

Rank

Non Member

Posts

118

Joined

Sat Dec 11, 2004 11:41 am

Location

Birmingham


Has thanked: 0 time
Been thanked: 2 times

Re: Ported heads on a GTA?

Postby AndyClark » Mon Sep 07, 2020 7:12 pm

Sorry, I meant that when you come off the accelerator, you 'feel' it (the decceleration) a lot more. So, the car seems to respond more quickly. The brakes etc are OK.

Has anyone had PRV heads gas-flowed?
no avatar
User

Custard

Rank

Non Member

Posts

790

Joined

Sat Oct 12, 2013 7:02 pm


Has thanked: 1 time
Been thanked: 35 times

Re: Ported heads on a GTA?

Postby Custard » Tue Sep 08, 2020 6:17 pm

On mine I did the Headwork the thing is you can improve the exhaust buy removing the big aluminium lobe which slows the gases down for I emissions, which is a big improvement however the inlet manifold is not that good.
I always look at money payed for HP/Torque improvement, £300 approx for a cam reprofile which will give a big gain as the standard lift is poor, that’s the best money spent for good gain.
If you want to spend big change the inlet valves for the later heads which I think are 43mm compared to your 38mm, I’ve been working on old Citroen stuff so I can’t remember the exact size.
Personally I just worked on the shape of the inlet port and the results are impressive for minimal cost but you do need to no what you are doing as it can lose you performance.
A lot of people chase Hp but for road driving and overtaking Torque every time over Top end Hp, so for the money do the cam and some light head work but the heads might open up a big can of worms when you take them off as there are liner issues which could come to light.


  • Advertisement

Who is online

Users browsing this forum: No registered users and 49 guests

Powered by phpBB ® | Renault' and 'Alpine' are trademarks of Renault S.A.S. or its subsidiaries and are used with kind permission of Renault France