What exactly is the difference between mildly modified engines, and radically modified engines??
Thread Starter
Burning Brakes
Joined: Nov 2003
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From: Beverly, NJ
What exactly is the difference between mildly modified engines, and radically modified engines??
What exactly is the difference between mildly modified engines, and radically modified engines?? I'm lookng at getting a new throttle body and I have to choose between a 52mm, and a 58mm. If I get a 58mm, what would be the effect on my engine if my engine is not radial enough, or if I have a mildly modified motor with 58mm? I am going to be adding hooker supercomp longtubes (2149s) and a hooker y-pipe, all coated inside and out. Also need to upgrade injectors, and like I said, upgrading the trottle body. Also, I still don't know what type of mufflers to get. I want it to sound mean at idle and at WOL, but I don't want alot of interior resonance when crusing. Any suggestions? thanks!
:cheers:
:cheers:
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St. Jude Donor '04-'05-'06-'07
Re: What exactly is modified engines?? (STL94LT1)
Unless you are doing a head/cam or stroker engine the stock throttle body will do fine. 58 mm TB's are rarely needed.
Team Owner
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Youll be hard pressed to use all the air a 52mm supplies with a TPI intake.
So you definitely wouldnt need a 58 until changing to a different intake, which is where I start to define 'radical'
I would call something with a ported plenum/runners, bigger base and some headwork to be 'mild'
You dont need bigger injectors. You probably do need new injectors or to have the stockers cleaned. Although going up to Ford SVO 24s and an AFPR is just fine if you decide to go that way. Stock is 22.
I like Power Effects mufflers, but they are unavailable until Mid-March at the earliest. They all have resonance somewhere though, but to different degrees. Corsas are unavailable for the L98.
Everyone here will have different definitions for mild and radical.
So you definitely wouldnt need a 58 until changing to a different intake, which is where I start to define 'radical'
I would call something with a ported plenum/runners, bigger base and some headwork to be 'mild'
You dont need bigger injectors. You probably do need new injectors or to have the stockers cleaned. Although going up to Ford SVO 24s and an AFPR is just fine if you decide to go that way. Stock is 22.
I like Power Effects mufflers, but they are unavailable until Mid-March at the earliest. They all have resonance somewhere though, but to different degrees. Corsas are unavailable for the L98.
Everyone here will have different definitions for mild and radical.
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 935
Likes: 2
From: Beverly, NJ
Re: What exactly is modified engines?? (Corvette Kid NC)
Yes and I don't think an injector change at this point will be of any benefit either. Have you considered a cam change (or at least some 1.6 RRs) and some programming?[/QUOTE]
Actually, before I bought my Vette, someone changed two of the injectors. The two that were changed don't even match the other six. Plus my car idles rough. I figure it can't hurt, considering the injectors are only $100 on SLP Performance.
Actually, before I bought my Vette, someone changed two of the injectors. The two that were changed don't even match the other six. Plus my car idles rough. I figure it can't hurt, considering the injectors are only $100 on SLP Performance.
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: What exactly is modified engines?? (darkman5001)
Actually, before I bought my Vette, someone changed two of the injectors. The two that were changed don't even match the other six. Plus my car idles rough. I figure it can't hurt, considering the injectors are only $100 on SLP Performance.
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 935
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From: Beverly, NJ
Re: (vader86)
[QUOTE]Youll be hard pressed to use all the air a 52mm supplies with a TPI intake.
So you definitely wouldnt need a 58 until changing to a different intake, which is where I start to define 'radical'
Well later on, I am planning on doing alot more engine work. What I am wondering is will it make the car run bad, or hurt anything if I just get a 58mm throttle boddy now, and use it with the above upgrades for a while? The 58mm is only like $20 more, and I don't want to buy something that I will need to upgrade again later on. My stock throttle body which is on the car now needs to be replaced. shaft worn and sticking.
You dont need bigger injectors. You probably do need new injectors or to have the stockers cleaned. Although going up to Ford SVO 24s and an AFPR is just fine if you decide to go that way. Stock is 22.
I wasn't going to put bigger than 25Ib injectors in. My old injectors don't match, from previous owners, and engine idles rough. I think it has a leaking or bad injector. If someone before me already changed 2 of them, which only god knows how long ago that was, then my guess is that the other 6 are probably shot too. Plus it looks like crap having 6 black injectors, and 2 fatter green injectors.
So you definitely wouldnt need a 58 until changing to a different intake, which is where I start to define 'radical'
Well later on, I am planning on doing alot more engine work. What I am wondering is will it make the car run bad, or hurt anything if I just get a 58mm throttle boddy now, and use it with the above upgrades for a while? The 58mm is only like $20 more, and I don't want to buy something that I will need to upgrade again later on. My stock throttle body which is on the car now needs to be replaced. shaft worn and sticking.
You dont need bigger injectors. You probably do need new injectors or to have the stockers cleaned. Although going up to Ford SVO 24s and an AFPR is just fine if you decide to go that way. Stock is 22.
I wasn't going to put bigger than 25Ib injectors in. My old injectors don't match, from previous owners, and engine idles rough. I think it has a leaking or bad injector. If someone before me already changed 2 of them, which only god knows how long ago that was, then my guess is that the other 6 are probably shot too. Plus it looks like crap having 6 black injectors, and 2 fatter green injectors.
Burning Brakes
Joined: Apr 2002
Posts: 1,126
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From: Cleveland OH
Re: (darkman5001)
Well later on, I am planning on doing alot more engine work. What I am wondering is will it make the car run bad, or hurt anything if I just get a 58mm throttle boddy now, and use it with the above upgrades for a while? The 58mm is only like $20 more, and I don't want to buy something that I will need to upgrade again later on. My stock throttle body which is on the car now needs to be replaced. shaft worn and sticking.
I wasn't going to put bigger than 25Ib injectors in.
I wasn't going to put bigger than 25Ib injectors in.
If you can't fix the current TB that you have, you may consider buying a used one from Contemporary Corvettes or from other forum members selling them on this site.
I would go with vader on the injectors especially if you have 2 that are unmatched.
Do you research and you'll end up being really happy with the results.
Good luck!
Ron
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Large Impressive Member
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From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Re: (darkman5001)
Well later on, I am planning on doing alot more engine work. What I am wondering is will it make the car run bad, or hurt anything if I just get a 58mm throttle boddy now, and use it with the above upgrades for a while? The 58mm is only like $20 more, and I don't want to buy something that I will need to upgrade again later on. My stock throttle body which is on the car now needs to be replaced. shaft worn and sticking.
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From: Athens AL
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Re: (darkman5001)
Well later on, I am planning on doing alot more engine work. What I am wondering is will it make the car run bad, or hurt anything if I just get a 58mm throttle boddy now, and use it with the above upgrades for a while? The 58mm is only like $20 more, and I don't want to buy something that I will need to upgrade again later on. My stock throttle body which is on the car now needs to be replaced. shaft worn and sticking.
You have to have something nasty to use 750cfm of air.
Youll risk idle problems and lose throttle response if you get a TB thats bigger than you need.
Get the 52.
[Modified by vader86, 11:47 PM 2/8/2004]
