cam install didnt go quit right!
cam install didnt go quit right! I just installed an MTI C2 Cam on a 114 in my car with manley springs and retainers. Before the cam install it was a "BOLT ON" only car and was running a pleasing 12.38 @ 108 on Nitto's. Now after the cam it is running a disguisting but pretty consistent 13.20's. This is baffling me! The car runs fine just feels kind of sluggish. When doing the install we used the stock timing chian and it felt like it might of had a little slop in it, maybe part of my problem, any feed back would be greatly appreiciated..... <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
"All Motor 9 Second club member"
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From: On the Bumper!
Re: cam install didnt go quit right! I have two possibilities that should brighten things up. First off have someone ATAP the car as you are probably pig rich, based on it feeling like a dog. Also , check your throttle cable and ensure that it is opening all the way up. If these don't help, then it's possible that you didn't get the cam and crank lined up properly, possibly causing to be retarded. I hope this helps. good luck.
James
James
"All Motor 9 Second club member"
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From: On the Bumper!
Re: cam install didnt go quit right! Well , did the two easy possibilities work out? I am curious to see how it went. Good choice on the springs. I broke a 918 Comp spring this morning as I idled to an intersection. Good luck.
James
James
Re: cam install didnt go quit right! we did an autotap on his car today. His o2's were around .930-.940s. We put a MAFT on it and tuned it down 6% at WOT and got the o2's down to .900s, He is however getting about 4 degrees of knock retard between 4500-5000 directly after the shifts.
His TPS was also only opening up to 98%, we did some adjusting and got it to 100%.
It's running a little bit better with the o2's down, we need to tune it down a little more. (I personally think this should be something that MTI should deal with for the $500 tuning he paid for). I did not want to lean it out any further with the knock retard he was already getting though. Anyone have any ideas what could be causing this knock retard? Possibly torque management?
His TPS was also only opening up to 98%, we did some adjusting and got it to 100%.
It's running a little bit better with the o2's down, we need to tune it down a little more. (I personally think this should be something that MTI should deal with for the $500 tuning he paid for). I did not want to lean it out any further with the knock retard he was already getting though. Anyone have any ideas what could be causing this knock retard? Possibly torque management?
"All Motor 9 Second club member"
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From: On the Bumper!
Re: cam install didnt go quit right! It sounds like it's coming around. On the leaning issue, once you get the MAFT tuned in Jayson can adjust convert the PE vs HP in LS1 edit to match the settings you have on the MAFT and that should allow the MAFT to be set at 0/0 or removed. I personally keep mine hooked up for fine tuning in ideal air. You might check the engine temp and try to keep it as close to 190-193 deg as possible. This will help minimize the KR. I am assuming that you are using 93 octane fuel. Jayson should also be able to desensitize the Knock sensors if it truely is false KR. I would also make sure your not pulling oil through your PCV system. That will definitely cause KR. FWIW- I always make a couple of hard high rpm runs before I start to log a run on ATAP because carbon build up will also give false or temp KR. I hope this helps. Take care.
"All Motor 9 Second club member"
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From: On the Bumper!
Re: cam install didnt go quit right! I forgot to mention also to use the TPS voltage instead of % open. I would shoot for 4.6 volts and this should give you maximum fuel and flow. This will be the equililant to the bump stop mod if you haven't already done that. Good luck.
James
James
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Launching!
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From: Plano, TX
Re: cam install didnt go quit right! </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by xaon:
<strong>
It's running a little bit better with the o2's down, we need to tune it down a little more. (I personally think this should be something that MTI should deal with for the $500 tuning he paid for). </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Are you saying he ALREADY had tuning done by MTI? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Something doesn't sound right, did he get the tuning and then later install the cam himself?
Sorry, just trying to get a bettter idea of whats going on. Going from a 12.38 to a 13.2 is a pretty major drop ESPECIALLY after installing a pretty beefy cam!
I know weather / track conditions can make direct comparisons difficult sometime, but DANG that's a lot of weather... LOL Hope you get it figured out.
<strong>
It's running a little bit better with the o2's down, we need to tune it down a little more. (I personally think this should be something that MTI should deal with for the $500 tuning he paid for). </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Are you saying he ALREADY had tuning done by MTI? <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" />
Something doesn't sound right, did he get the tuning and then later install the cam himself?
Sorry, just trying to get a bettter idea of whats going on. Going from a 12.38 to a 13.2 is a pretty major drop ESPECIALLY after installing a pretty beefy cam!
I know weather / track conditions can make direct comparisons difficult sometime, but DANG that's a lot of weather... LOL Hope you get it figured out.
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Verdad Gallardo Re: cam install didnt go quit right! he had them do a little bit of tuning prior to putting the cam in so it wouldn't throw codes and would idle (pulled AIR/EGR, bumped up the idle speed a tad bit) Then he took it back again a couple days after the cam install for them to readjust the tuning for the cam (per their instructions). They drilled out the TB, and adjusted the idle speed (though it doesn't look they adjusted it in the PCM, they just messed with the idle screw, and bit the stop on the TB cam up a little bit (instead of pulling the screw down)). I forgot to look at the desired idle rpm in autotap, but at idle his Throttle Position Angle is 14% with the car idling about 900-950rpm. They also bumped the rev limiter and shift points up a little bit, and desnsitized torque management a "little bit."
Re: cam install didnt go quit right! Thanks Xoan, I will be pulling the front of the motor today and installing an SLP double roller, and degreeing the cam one last time. If it still is not running right then it is of to MTI, and I rest my blame on the tuning......
<img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
<img border="0" title="" alt="[Sad]" src="gr_sad.gif" />
On The Tree
Joined: Nov 2001
Posts: 103
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From: Chicagoland
Re: cam install didnt go quit right! I had a similar problem, bolt-on dyno was 300rwhp/383tq, after T1 install I had this:
<img src="http://www.fasta4racing.com/paul/dyno4%265s.jpg" alt=" - " />
I ended up pulling the T1 and replacing it with a B1 and did a set of heads (later higher number). Much better, atleast until my head gasket started leaking and using coolant (Car is in shop for thicker gaskets now).
<img src="http://www.fasta4racing.com/paul/dyno4%265s.jpg" alt=" - " />
I ended up pulling the T1 and replacing it with a B1 and did a set of heads (later higher number). Much better, atleast until my head gasket started leaking and using coolant (Car is in shop for thicker gaskets now).
On The Tree
Joined: Nov 2001
Posts: 103
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From: Chicagoland
Re: cam install didnt go quit right! Oh, my best bolton time was 12.114 @ 110.47 with a 3595 race weight, did 12.08@112.85 with heads/cam at 3740lb race. <img border="0" title="" alt="[Mad]" src="gr_images/icons/mad.gif" /> <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />
Re: cam install didnt go quit right! Paulie what are you saying that 13.20's is what i should be running? I think you might have some problems also.... <img border="0" title="" alt="[Sad]" src="gr_sad.gif" />