How can you make it safe to boost in 5th gear?
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How can you make it safe to boost in 5th gear?
I want to know what it takes to make it safe(r) to boost in 5th gear. I'm debating between the maxrev(t3/t4 .57trim) and Vortech but I would like to know which be easier on the motor at high speeds. I know the Progress/Hondata whatever civic ran 200+ with a b20 and the Vortech and Peter Cunningham runs one on his NSX so the kit can't be as bad as what everybody here says. Anyways, any opinions welcome and thanks in advance.
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Re: How can you make it safe to boost in 5th gear? (lube)
What's your ultimate goal? To boost in 5th gear, or top speed? Really, the biggest problem in 5th is you can be boosting for a LOOOONG time before you run out of gearing. The problem is the heat buildup. I'd say some extremely hefty pistons and iron sleeves would be a minimum. Some extreme method of keeping the internals from melting down would be required as well (ceramic coatings maybe?) Don't forget the rough rule of thumb of a max of 15-20 seconds of sustained boost to keep your internals safe. This is something I've thought about before, but it really doesn't seem worth the trouble to compensate for unless you're going for some type of landspeed record and the like.
Just a few thoughts I've had,
Ryan P.
Just a few thoughts I've had,
Ryan P.
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Re: How can you make it safe to boost in 5th gear? (lube)
General Rule of thumb...dont base a decision on what Fully Funded Pro Teams are using, because chances are, their setups arent even close to what you'd be getting.
Suprdave
Suprdave
#5
Re: How can you make it safe to boost in 5th gear? (SJP0tato)
What's your ultimate goal? To boost in 5th gear, or top speed? Really, the biggest problem in 5th is you can be boosting for a LOOOONG time before you run out of gearing. The problem is the heat buildup. I'd say some extremely hefty pistons and iron sleeves would be a minimum. Some extreme method of keeping the internals from melting down would be required as well (ceramic coatings maybe?) Don't forget the rough rule of thumb of a max of 15-20 seconds of sustained boost to keep your internals safe. This is something I've thought about before, but it really doesn't seem worth the trouble to compensate for unless you're going for some type of landspeed record and the like.
Just a few thoughts I've had,
Ryan P.
Just a few thoughts I've had,
Ryan P.
what info do you have on this?
do you even have a boosted car?
my shitty sohc has seen 6psi in 5th doing 120 on the interstate right before the fuel cut kicked in. my pos is fully stock minus the turbo and ic and i know i was up there for atleast a minute.
disel trucks boost all the time they never break anything. sure they are built stronger but they dont have any heat problems. you get your a/f correct and timing, you will not have any problems with heat.
please show me you basis for these asumptions!
not positive but please check the info on that sc civic i am pretty sure that was an si with a b16 head and a b18b block, not a b20
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Re: How can you make it safe to boost in 5th gear? (Esone3)
I hate to sound like a water injection *****, since I've never even used it before (am I a lyricist?). From what I've read it could help out in situations where heat build up is a problem. If you're serious about safely boosting 5th gear for extended periods of time, it may be worth looking into for ya.
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Re: How can you make it safe to boost in 5th gear? (mos)
I was told not to boost in 5th gear because it was the weakest of the gears. Doesn't really make sense to me. I could see why you wouldn't want to boost for longer than 15-20 seconds, but I think that only applies to 5th gear because 5th is the only gear that you could actually boost for that long in.
#9
What is this crap?
Re: How can you make it safe to boost in 5th gear? (SuperchargedGSR)
not the weakest- just higher loads can be put on the engine, for the longest amount of time, higher speeds = more wind resistance, even more load on engine, more heat in engine/exhust/turbo.
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Re: How can you make it safe to boost in 5th gear? (Suprdave)
General Rule of thumb...dont base a decision on what Fully Funded Pro Teams are using, because chances are, their setups arent even close to what you'd be getting.
Suprdave
Suprdave
#11
Re: How can you make it safe to boost in 5th gear? (falconGSR)
Yes, turbodiesels are under lots of boost nearly all the time. From the factory they have forged everything (thick rods, pistons, crank) and a generous iron block. My diesel is under boost even at idle!
But also consider diesels run at a far lower operating temperature than an equivalent gas engine, ~250-300F at idle vs 850-900F at idle for a gas engine. Peak EGT is about the same however... mebbe 100F lower for certain types of diesels...
But also consider diesels run at a far lower operating temperature than an equivalent gas engine, ~250-300F at idle vs 850-900F at idle for a gas engine. Peak EGT is about the same however... mebbe 100F lower for certain types of diesels...
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Re: How can you make it safe to boost in 5th gear? (metal-x)
You guys are awesome. Thanks a ton for all the help.
So the main thing like always is just to have good components and good tuning, right?
FI forum
So the main thing like always is just to have good components and good tuning, right?
FI forum
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Re: How can you make it safe to boost in 5th gear? (CovertFI)
heat building up?? wtf
what info do you have on this?
what info do you have on this?
do you even have a boosted car?
my shitty sohc has seen 6psi in 5th doing 120 on the interstate right before the fuel cut kicked in. my pos is fully stock minus the turbo and ic and i know i was up there for atleast a minute.
disel trucks boost all the time they never break anything. sure they are built stronger but they dont have any heat problems. you get your a/f correct and timing, you will not have any problems with heat.
please show me you basis for these asumptions!
Ryan P.
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Re: How can you make it safe to boost in 5th gear? (SuperchargedGSR)
If your running a JRSC you dont have much to worry about anyway cause they suck. But if you got turbo eventully you will kill your motor.
#19
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Re: How can you make it safe to boost in 5th gear? (lube)
I learned a very long time ago that most people who give out advise, dont have any real firsthand experiance with it.
There are only two ways to blow your motor up by boosting in 5th gear:
1] preignition
2] detonation
and YES, they are two entirely different things.
And another thing, there is no way in hell you will "melt" a piston due to excessive combustion heat. After a while heat soak may cause your motor to detonate or preignite, which will then destroy things. If your motor is tuned properly, it will not blow. You just need to leave a healthy margin of error due to the extreme load.
[Modified by RioNinja, 7:26 PM 11/8/2002]
There are only two ways to blow your motor up by boosting in 5th gear:
1] preignition
2] detonation
and YES, they are two entirely different things.
And another thing, there is no way in hell you will "melt" a piston due to excessive combustion heat. After a while heat soak may cause your motor to detonate or preignite, which will then destroy things. If your motor is tuned properly, it will not blow. You just need to leave a healthy margin of error due to the extreme load.
[Modified by RioNinja, 7:26 PM 11/8/2002]
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Re: How can you make it safe to boost in 5th gear? (RioNinja)
1] preignition
2] detonation
and YES, they are two entirely different things.
[Modified by RioNinja, 7:26 PM 11/8/2002]
2] detonation
and YES, they are two entirely different things.
[Modified by RioNinja, 7:26 PM 11/8/2002]
#21
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Re: How can you make it safe to boost in 5th gear? (lube)
Boosting in 5th gear and breaking sounds like a myth to me. Boosting in 5th gear for long periods at 20 psi of boost may be bad for the motor but so is gettiing airborne......think about it which one would happen first???
If your tunning is on you shouldnt have any probs in 5th gear.
If your tunning is on you shouldnt have any probs in 5th gear.
#22
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Re: How can you make it safe to boost in 5th gear? (saso)
You should have no problems boosting in 5th gear, granted tuning is correct.
All this top speed talk is killing me....ok, ive gone about 155 (very, very scary) in my car on the highway without blowing the motor. Although last week I blew the **** out of my motor and only going 120mph
All this top speed talk is killing me....ok, ive gone about 155 (very, very scary) in my car on the highway without blowing the motor. Although last week I blew the **** out of my motor and only going 120mph
#23
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Re: How can you make it safe to boost in 5th gear? (lube)
So what exactly is the difference?
https://honda-tech.com/zerothread?id=328862
#25
Re: How can you make it safe to boost in 5th gear? (rioninja)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rioninja »</TD></TR><TR><TD CLASS="quote"><BLOCKQUOTE>quote:<HR>
So what exactly is the difference?<HR></BLOCKQUOTE>
This is the "exact difference".
https://honda-tech.com/zerothread?id=328862 </TD></TR></TABLE>
That article written by the GM guy should be required reading for everyone who wants to make more power be it supercharge, turbocharge, N20 or just plain N/A. It applies to everything.
So what exactly is the difference?<HR></BLOCKQUOTE>
This is the "exact difference".
https://honda-tech.com/zerothread?id=328862 </TD></TR></TABLE>
That article written by the GM guy should be required reading for everyone who wants to make more power be it supercharge, turbocharge, N20 or just plain N/A. It applies to everything.