20v head swap, need a parts list Options

[trd94]

ok after doing some research i have decided to swap a 20v on my 7a , so right now i am puttting together a parts list of what is needed and i hope you guys can help me out, 1. a 20v head i want a full head with the intake and all the sensors ,right. 2. i will use a set of 4age pistons for the 20v head ,also they will be a lower compression. 3. the rods i want to know if a set of 4age rods will work or do i need a costom set? 4. what timming belt do i use ,i heard a 944 belt works but i dont know. 5. how do i wire it up and can i use a piggyback unit like emanage or do i have to go stand alone, i will be running a turbo on this setup but i am not out to make huge hp , so any help would be great ,thanks again guys

This post has been edited by trd94: Feb 15, 2007 - 10:55 AM

[Kwanza26]

ok after doing some research i have decided to swap a 20v on my 7a , so right now i am puttting together a parts list of what is needed and i hope you guys can help me out, 1. a 20v head i want a full head with the intake and all the sensors ,right. 2. i will use a set of 4age pistons for the 20v head ,also they will be a lower compression. 3. the rods i want to know if a set of 4age rods will work or do i need a costom set? 4. what timming belt do i use ,i heard a 944 belt works but i dont know. 5. how do i wire it up and can i use a piggyback unit like emanage or do i have to go stand alone, i will be running a turbo on this setup but i am not out to make huge hp , so any help would be great ,thanks again guys

20V pistons in a 7A block will NOT lower compression. It'll raise compression to at least equal that for a stock 20V (which is 10:5 or 11 depending on version) porssibly more beacause of the increased stroke. 4AGE rods WILL NOT work... they are too short and the rod journals are too small. porsche 944 timing belt WILL NOT work because the 20V head is different from a 16V head and the 20V and 16V use different timing belts.

[trd94]

ok after doing some research i have decided to swap a 20v on my 7a , so right now i am puttting together a parts list of what is needed and i hope you guys can help me out, 1. a 20v head i want a full head with the intake and all the sensors ,right. 2. i will use a set of 4age pistons for the 20v head ,also they will be a lower compression. 3. the rods i want to know if a set of 4age rods will work or do i need a costom set? 4. what timming belt do i use ,i heard a 944 belt works but i dont know. 5. how do i wire it up and can i use a piggyback unit like emanage or do i have to go stand alone, i will be running a turbo on this setup but i am not out to make huge hp , so any help would be great ,thanks again guys

20V pistons in a 7A block will NOT lower compression. It'll raise compression to at least equal that for a stock 20V (which is 10:5 or 11 depending on version) porssibly more beacause of the increased stroke. 4AGE rods WILL NOT work... they are too short and the rod journals are too small. porsche 944 timing belt WILL NOT work because the 20V head is different from a 16V head and the 20V and 16V use different timing belts.

then please help me out , the pistons i was going to use was a set of forged units that when installed into a 20v would lower the compression down to 9:1 , the rods where just a idea but i think the rods nik use would be better , so what timing belt should i use any ideas , this is why i am trying to find out any info ,and set up a parts list so i dont get any thing i dont need

[frotou]

For the timming belt with 7a+20v head I think guys run with 20v (or 16v ?) timming belt (don't forget the 4a lower timming gear) with modified 7a tensionner to fit .

Claude

[trd94]

For the timming belt with 7a+20v head I think guys run with 20v (or 16v ?) timming belt (don't forget the 4a lower timming gear) with modified 7a tensionner to fit .

Claude

wow i did not know this thanks man . what do i have to do to the tensionner to get it to work and what parts would i need,

[normality78]

how about distributor? The last research that i've done whn im trying to convert to 16V GE head, they mentioned there is no way i can control the distributor unless im using standalone ecu. pls correct me if im wrong

[Toynado]

how about distributor? The last research that i've done whn im trying to convert to 16V GE head, they mentioned there is no way i can control the distributor unless im using standalone ecu. pls correct me if im wrong

i did the same conversion. i used the 7afe rods with 7afe pistons the belt i used was a renault espase mpv belt it's got 117 teeth if i remember correct.the tensioner i had made bigger by 5mm but i heard you can use the mazda 2.0 16v gold tappetcover tensioner. the housing on the back of the head will not allighn over the water pump cause of the taller block. and i used a stand alone ecu.

[normality78]

whahaha, " i used a stand alone ecu" explained everything