Throttle coolant block off. - Page 2 - ZR-1 Net Registry Forums

Aurora40 · 12-02-2010

Quote:

Originally Posted by rhipsher

Paul it doesn't happen on start up. Only after you push the gas peddle. And im willing to bet that the cars you mention that were started in -60 degrees didn't have the throttle coolant blocked off either so it would of never of happened to them.

What he was saying though, is coolant to the TB or not, starting an engine that's been sitting overnight in the cold, it would exhibit the same problem when you drive away (dunno about you, but my coolant doesn't warm up in 20 seconds) if this were in fact a normal issue. -60 degree coolant isn't going to warm up a -60 degree throttle body.

I have to agree with Paul, that does not sound like a normal issue. However, if hooking the TB coolant line back up works and is easy for you, it sounds like a satisfactory fix.

tomtom72 · 12-02-2010

Hey, on an EFI car you don't step on the gas to cold start it. That's what the IAC is for, isn't it? The blades do not move, rather by-pass air is allowed in thru the IAC? You just turn the key over to "start" and when it fires you release the key and it idles on the fueling program labeled "cold start" in the PROM, no? Okay, I know that is an over simplification as the coolant temp and closed loop stuff comes into play...but basically just turn the key. If you don't step on the gas you would never know that the T/B contracted around the throttle blades, right?

The rest of the stuff about the HP gain from having the spacers is open to debate. If the T/B is cut off from coolant it would take awhile for it to warm up due to conductive heating. If the ambient temps were low enough, and the insulator blocks actually do what is advertised, it could interfere with the conductive heating of the T/B. In theory, if the spacers are true insulators you could wind up with steel throttle plates binding on an aluminum hole.

carter200 · 12-02-2010

Paul and USAFPILOT,
Paul needs to take a chill pill and read my response about the billet throttle body plate. I, in jest, put that it was good for "up to", meaning from 0 to 50 hp. It was a joke!
Yes, USAFPILOT, I was funnin with you guys as NO throttle body plate makes any HP.

C'mon everyone don't take everything people say as the gospel. Humor is your friend in these tough times. Rick can back me up on this one, too

carter200 · 12-02-2010

Quote:

Originally Posted by USAFPILOT

what plate are we talking about that can get you 50HP? Are you serious?

A 50 hot of NOS is the only plate that would do that. No, I was funnin with you all.

carter200 · 12-02-2010

Quote:

Originally Posted by tomtom72

The rest of the stuff about the HP gain from having the spacers is open to debate.

No where in any of the posts did anyone say that the insolating plates Rick has makes any HP. Please read the complete posts before reacting.........

tomtom72 · 12-02-2010

You are right Carter!

I should have wrote that the magnitude of the effects upon the HP production are open to debate as a result of using the insulators. My apologies.

I think anything that keeps the intake system from becoming a heat sink should deliver cooler air to the cylinders, and cooler is always better, right?

xlr8nflorida · 12-02-2010

Quote:

Originally Posted by carter200

No where in any of the posts did anyone say that the insolating plates Rick has makes any HP. Please read the complete posts before reacting.........

There is a company that makes spacers for plenum, ih, tb etc that claims horesepower gains.

I can't remember name of company now maybe randy woods?

Paul Workman · 12-02-2010

Quote:

Originally Posted by xlr8nflorida

There is a company that makes spacers for plenum, ih, tb etc that claims horesepower gains.

I can't remember name of company now maybe randy woods?

Long as were havin' fun, there is also a company claiming their "Tornado" will add up to (something like) 25 hp and gobs of improved mpg. Sheeeiiitt! You mean I coulda got the same results with a spacer and a "Tornado" that I'm getting with full porting and exhaust upgrades????

BTW...I wasn't intending to take anyone to task: I fully realize hp claims abound for all kinds of gadgetry. Some work, most don't (except under the most bisare special circumstances, circumstances that so often negate anything remotely resembling a scientific approach...)

P.

xlr8nflorida · 12-02-2010

I'm not talking about some crappy tornado.

The company I'm talking about has a good reputation of quality products.

Does it work to manufacturers horsepower claims, I doubt it but I guarantee it helps with heat soak. Many drag racers ice down their engine between runs to avoid heat soak.

VetteMed · 12-02-2010

To add to the confusion a little here, I have experienced throttle sticking in other cars with the TB coolant bypassed (TPI motors), but the interesting thing here is that a new throttle body corrected the problem - which leads me to believe that sloppy throttle plate shafts or bearings may predispose to sticking of the throttle. On a "new" motor, it's probably less sensitive to the minor changes in dimensions associated with thermal expansion/contraction, but throw some slop in tolerances into the mix, and maybe there's enough change in geometry to create a problem.

12-02-2010	#12
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Throttle coolant block off. Hey, on an EFI car you don't step on the gas to cold start it. That's what the IAC is for, isn't it? The blades do not move, rather by-pass air is allowed in thru the IAC? You just turn the key over to "start" and when it fires you release the key and it idles on the fueling program labeled "cold start" in the PROM, no? Okay, I know that is an over simplification as the coolant temp and closed loop stuff comes into play...but basically just turn the key. If you don't step on the gas you would never know that the T/B contracted around the throttle blades, right? The rest of the stuff about the HP gain from having the spacers is open to debate. If the T/B is cut off from coolant it would take awhile for it to warm up due to conductive heating. If the ambient temps were low enough, and the insulator blocks actually do what is advertised, it could interfere with the conductive heating of the T/B. In theory, if the spacers are true insulators you could wind up with steel throttle plates binding on an aluminum hole. __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

12-02-2010	#13
carter200 Join Date: Jun 2004 Location: Texas Posts: 2,418	Re: Throttle coolant block off. Paul and USAFPILOT, Paul needs to take a chill pill and read my response about the billet throttle body plate. I, in jest, put that it was good for "up to", meaning from 0 to 50 hp. It was a joke! Yes, USAFPILOT, I was funnin with you guys as NO throttle body plate makes any HP. C'mon everyone don't take everything people say as the gospel. Humor is your friend in these tough times. Rick can back me up on this one, too __________________ 95 ZR-1 BLK/Gry #392 LT5 Reg# 868 RIP ZR1NET Founding Mem #155

12-02-2010	#16
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,609	Re: Throttle coolant block off. You are right Carter! I should have wrote that the magnitude of the effects upon the HP production are open to debate as a result of using the insulators. My apologies. I think anything that keeps the intake system from becoming a heat sink should deliver cooler air to the cylinders, and cooler is always better, right? __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

12-02-2010	#19
xlr8nflorida Join Date: May 2008 Location: USA Posts: 1,093	Re: Throttle coolant block off. I'm not talking about some crappy tornado. The company I'm talking about has a good reputation of quality products. Does it work to manufacturers horsepower claims, I doubt it but I guarantee it helps with heat soak. Many drag racers ice down their engine between runs to avoid heat soak.

12-02-2010	#20
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,816	Re: Throttle coolant block off. To add to the confusion a little here, I have experienced throttle sticking in other cars with the TB coolant bypassed (TPI motors), but the interesting thing here is that a new throttle body corrected the problem - which leads me to believe that sloppy throttle plate shafts or bearings may predispose to sticking of the throttle. On a "new" motor, it's probably less sensitive to the minor changes in dimensions associated with thermal expansion/contraction, but throw some slop in tolerances into the mix, and maybe there's enough change in geometry to create a problem.