[Land-speed] EGT

[Skip Higginbotham]

I started with turbos and kept the cam. Wanted to keep the longer cam 
to help kill off low end torque and cool the pistons. Seems to have 
worked as we experienced very little wheel spin and still ran a 275 
quarter. That could be the reason for the (seems like) high EGTs? 
Will look for an intercooler.
Skip




At 09:58 AM 9/30/2008, Dave Dahlgren wrote:
>sounds like a turbo cam with an SC engine to me...
>Dave
>----- Original Message ----- From: "Skip Higginbotham" <saltrat at pahrump.com>
>To: "Dave Dahlgren" <ddahlgren at snet.net>; "Adin, David" 
><DavidAdin at mercydurango.org>
>Cc: <land-speed at autox.team.net>
>Sent: Tuesday, September 30, 2008 12:54 PM
>Subject: Re: [Land-speed] EGT
>
>
>>Dave,
>>  Lobe separation is 114, .750 valve lift, and the plugs look slightly rich.
>>Skip
>>
>>
>>
>>
>>At 09:17 AM 9/30/2008, Dave Dahlgren wrote:
>>>What is the lobe separation is the real number I am after do plugs 
>>>look like it is a happy engine? I have run some pretty good 
>>>overlap in a SC engine that would be too much for a turbo. 107 to 
>>>108 lobe centers with an intake centerline of 110 is pretty 
>>>common. The idea is to blow a little fresh air over the piston to 
>>>cool it down and screw the fuel consumption or brake specific 
>>>readings this is not a mileage test..LOL The charge air cooling is 
>>>a good idea on two fronts.. first it will make more power with 
>>>less boost second it will lower the intake air temps a ton which 
>>>will lower the egt as well. Right now I would bet the intake air 
>>>temps are well over 300 possibly close to 400. If you drop the 
>>>intake air temp 200 degrees the egt goes down with them.  as you 
>>>suggest the O2 sensor readings are probably not worth worrying 
>>>about just read the plugs.
>>>Dave
>>>----- Original Message ----- From: "Skip Higginbotham" <saltrat at pahrump.com>
>>>To: "Dave Dahlgren" <ddahlgren at snet.net>; "Adin, David" 
>>><DavidAdin at mercydurango.org>
>>>Cc: <land-speed at autox.team.net>
>>>Sent: Tuesday, September 30, 2008 12:04 PM
>>>Subject: Re: [Land-speed] EGT
>>>
>>>
>>>>Hi Dave,
>>>>Cam timing is 322 duration split, ignition timing is 30 degrees 
>>>>locked, a/f ratios are not accurate (according to gage 
>>>>engineering) due to short stacks, 12", and sensor about 4" from 
>>>>valve (1 cyl).....but it read .5 to .6 volts at power and RPM 
>>>>until the rockers both broke on that cyl.
>>>>Skip
>>>>
>>>>
>>>>
>>>>
>>>>At 08:33 AM 9/30/2008, Dave Dahlgren wrote:
>>>>>tell me about the cam timing and ignition timing a/f ratios if 
>>>>>you have them..
>>>>>Dave
>>>>>----- Original Message ----- From: "Skip Higginbotham" 
>>>>><saltrat at pahrump.com>
>>>>>To: "Adin, David" <DavidAdin at mercydurango.org>
>>>>>Cc: <land-speed at autox.team.net>
>>>>>Sent: Tuesday, September 30, 2008 11:06 AM
>>>>>Subject: Re: [Land-speed] EGT