2.4 n/a build but without tune (help) - Performance Forum

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2.4 n/a build but without tune (help)
Saturday, July 21, 2007 8:03 PM
Ok so im about to finish my build and heres what i have so far:
10.5:1 cr pistons with .020
secret cams
valve job
ho mani and tb (polished intake)
header
my question is simple...... i know it would be best to tune it off the start no doubt, but has anyone ever done this without a tune and what are my options besides hpt?

Help please


www.rdracing.110mb.com

Re: 2.4 n/a build but without tune (help)
Saturday, July 21, 2007 8:16 PM
Other than HPT your other options would be a standalone like Megasquirt or maybe an eManage, although I wouldn't suggest the latter - for that cost you'd be a fool to not go with HPT really. Really I'd say HPT is the default choice unless you have the need to edit or add parameters that are outside of its scope, and with an N/A build, I can't see you running into those kinds of parameters.

An additional note - other than the fact that you have an automatic (at least according to your registry...you also don't have the other most recent mods in there yet), I'm thinking of perhaps the same sort of route that you've taken. I'd be interested to see what kind of numbers you get if you dyno tune your car, as it might give me a little insight into what I could possibly expect...
Re: 2.4 n/a build but without tune (help)
Saturday, July 21, 2007 8:29 PM
OK so i still have a couple of questions??? what is to happen if i dont tune my car now, what i mean is i dont have the money to buy tuning software right now and it will be a while before i get it. So should i get the car back together then wait till i can tune it (or get it tuned) or can it be driven safely without a tune?


www.rdracing.110mb.com
Re: 2.4 n/a build but without tune (help)
Saturday, July 21, 2007 9:48 PM
I would also suggest HPT for your set-up, BUT just having HPT is one thing. You have to know how to tune it. Which is a totally different thing. NO one can say 100% that you will be safe without a tune or not. TO be safe I would start with some 93 octane fuel get it running and get a wideband on the car to see what your air/fuel ratio is. Also find someone who can datalog knock. I would not push the motor until you can check the air/fuel and look/listen for knock.



FU Tuning



Re: 2.4 n/a build but without tune (help)
Sunday, July 22, 2007 5:19 AM
Ok so i can get a Wideband O2 to monitor the A/F ratio... Can i get an afpr to have some adjustment to that? Also can you explain to me alittle more in depth about data logging the knock and where i can get it done? Sorry im a noob to tuning a car and im just trying to get the facts straight


www.rdracing.110mb.com
Re: 2.4 n/a build but without tune (help)
Sunday, July 22, 2007 10:07 PM
ok so can it be driven wothout a tune or not???


www.rdracing.110mb.com
Re: 2.4 n/a build but without tune (help)
Monday, July 23, 2007 9:08 AM
It can but i wouldn't do if for long its not worth screwing something up after all the work you put into a build.



Re: 2.4 n/a build but without tune (help)
Monday, July 23, 2007 11:48 AM
yeah i understand... I talked to shifted and i might have him do it for me.


www.rdracing.110mb.com
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