need help, poor mans type r
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From: newtown, ct, usa
need help, poor mans type r
The problem I am having, piston melts on the intake side cylinder #3. This happened twice 2 different tuners.
the set up:
gsr block, oversized ctr pistons, type r head, type r cams, 440cc injectors, stock t/b and b16 intake man. warlboro fuel pump, stock head gasket and a/fwas 12.0 -12.3 acoss the board. Tuned on a Dynapack. 178whp and 135 torque. dist is sync w/s200 hondata
But on the last run it melted. Is the type R head and ctr piston making the compression to high? I was told it was about 12.1. Do I need race gas?
I also dont think it has type R cams because it made most of its hp at 7000 rpm.
I have also looked at a lot of set ups and nobody uses ctr pistons in a gsr block, is this true.
I have taken it apart and it looks like the piston sits a little higher than the block. I thought the machine shop would have told me if it was higher.
Modified by 22psicrx at 4:49 PM 4/30/2008
the set up:
gsr block, oversized ctr pistons, type r head, type r cams, 440cc injectors, stock t/b and b16 intake man. warlboro fuel pump, stock head gasket and a/fwas 12.0 -12.3 acoss the board. Tuned on a Dynapack. 178whp and 135 torque. dist is sync w/s200 hondata
But on the last run it melted. Is the type R head and ctr piston making the compression to high? I was told it was about 12.1. Do I need race gas?
I also dont think it has type R cams because it made most of its hp at 7000 rpm.
I have also looked at a lot of set ups and nobody uses ctr pistons in a gsr block, is this true.
I have taken it apart and it looks like the piston sits a little higher than the block. I thought the machine shop would have told me if it was higher.
Modified by 22psicrx at 4:49 PM 4/30/2008
Honda-Tech Member
Joined: Apr 2006
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From: Right, Here, .
Re: need help, poor mans type r (22psicrx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 22psicrx »</TD></TR><TR><TD CLASS="quote">The problem I am having, piston melts on the intake side cylinder #3. This happened twice 2 different tuners.
the set up:
gsr block, oversized ctr pistons, type r head, type r cams, 440cc injectors, stock t/b and b16 intake man. warlboro fuel pump, stock head gasket and a/fwas 12.0 -12.3 acoss the board. Tuned on a Dynapack. 178whp and 135 torque. dist is sync w/s200 hondata
But on the last run it melted. Is the type R head and ctr piston making the compression to high? I was told it was about 12.1. Do I need race gas?
I also dont think it has type R cams because it made most of its hp at 7000 rpm.
I have also looked at a lot of set ups and nobody uses ctr pistons in a gsr block, is this true.
I have taken it apart and it looks like the piston sits a little higher than the block. I thought the machine shop would have told me if it was higher.
Modified by 22psicrx at 4:49 PM 4/30/2008</TD></TR></TABLE>
If the piston flats are out of the block, then it may have been decked a lot. Also, is the machine shop knowledgeable of Honda Builds? Did they clay the motor or measure V2P clearance. If the block was decked a lot, your CR maybe too high for pump gas and you may need race fuel.
the set up:
gsr block, oversized ctr pistons, type r head, type r cams, 440cc injectors, stock t/b and b16 intake man. warlboro fuel pump, stock head gasket and a/fwas 12.0 -12.3 acoss the board. Tuned on a Dynapack. 178whp and 135 torque. dist is sync w/s200 hondata
But on the last run it melted. Is the type R head and ctr piston making the compression to high? I was told it was about 12.1. Do I need race gas?
I also dont think it has type R cams because it made most of its hp at 7000 rpm.
I have also looked at a lot of set ups and nobody uses ctr pistons in a gsr block, is this true.
I have taken it apart and it looks like the piston sits a little higher than the block. I thought the machine shop would have told me if it was higher.
Modified by 22psicrx at 4:49 PM 4/30/2008</TD></TR></TABLE>
If the piston flats are out of the block, then it may have been decked a lot. Also, is the machine shop knowledgeable of Honda Builds? Did they clay the motor or measure V2P clearance. If the block was decked a lot, your CR maybe too high for pump gas and you may need race fuel.
Honda-Tech Member
Joined: Apr 2006
Posts: 4,921
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From: Right, Here, .
Re: need help, poor mans type r (22psicrx)
If the machine shop is not familiar w/ hondas and high compression setups they may assume the v2p clearances are fine. If they mainly deal w/ domestics they may not be familiar w/ the tight clearances Honda motors have, and how quickly CR can get too high for pump gas if the block is decke or head is milled too much. I once had a friend take his motor to a local machine shop that mainly did domestic work and they assembled his block with way too loose piston to wall clearances and piston ring gaps cause it is common on domestic motors to run larger clearances then Honda motors and run fine.
Junior Member
Joined: Dec 2004
Posts: 368
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From: SoCal, California, United States
piston sits a little higher than the block??? that doesnt sound safe..post up a pic
and are you sure the pistons were installed right??? pistons do have an intake and an exhaust side... (bigger valve reliefs for intake valves..)
Modified by gsrcrazy at 9:56 PM 4/30/2008
and are you sure the pistons were installed right??? pistons do have an intake and an exhaust side... (bigger valve reliefs for intake valves..)
Modified by gsrcrazy at 9:56 PM 4/30/2008
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