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Is there any difference between Type S engine and ATR?
Posted: Mon Apr 23, 2018 8:01 pm
by usman754
Hi guys,
Like above, is there any difference in those engines? Same Cams etc???
Thank you in advance.
Regards.
Usman
Posted: Mon Apr 23, 2018 8:11 pm
by nitin_s1
Everything is the same apart from the blocks (Type-S has special block to accommodate the ATTS) and ATR has a different intake manifold then the Type-S. Those are the things I can remember right now and I’m sure people will come and say other things..
Posted: Mon Apr 23, 2018 8:38 pm
by usman754
Thank you Nitin, I am going to pick up cams of ATR to put them into my Prelude. I just wanted to make sure that the cams are same as type S.
Posted: Mon Apr 23, 2018 10:09 pm
by nitin_s1
Cams should be the same as the Type-S
Posted: Mon Apr 23, 2018 10:16 pm
by Dennis van dijk
From what i learned there was a little differnce in the cams
Posted: Tue Apr 24, 2018 5:20 am
by hondaddict
Cams are strictly the same , as far as i know ( same part number) .
Pistons and rods are different but the compression ratio is the same
Posted: Tue Apr 24, 2018 6:57 am
by Dennis van dijk
When they have same partnumber then there the same haha
Posted: Tue Apr 24, 2018 11:44 am
by Merlin
nitin_s1 wrote:Everything is the same apart from the blocks (Type-S has special block to accommodate the ATTS) and ATR has a different intake manifold then the Type-S. Those are the things I can remember right now and I’m sure people will come and say other things..
ATR will use a 55mm mains crank whereas the Type-S will use 50 mm (well at least the early ones), Rich at PAW said that he is not sure if the later ones got 55mm crank.
Posted: Tue Apr 24, 2018 11:54 am
by Froidas
If we talk about internals, Type S H22A, H22A7 and H22A8 are all the same.
I didn't know about crank mains, though.
Posted: Wed Apr 25, 2018 5:17 pm
by honda-hardy
My type s definitely had 50mm mains. A7 a8 have 55mm