Which Intank pump for at least 550whp?

[rdrkt]

Chris Tapp Made 707 to the wheels with a 255...

Um no that's not even close to possible. Check your facts. :thumbdown

 

[rdrkt]

I cant believe some of the BS I am seeing here. Unlike some of the guys arguing in this thread I have actually been there done that. I think some of you guys need to do some research into what other people in the community have already experimented with before you start spreading misinformation.

I’m surprised no one has mentioned injector sizing in this equation. If you are going to try to make 550 wheel on 720cc injectors you are going to need a hell of a lot higher base fp then you would if you used 960s and that will make a big difference on how hard your are taxing your fuel pump. Also using nitrous is going to put a MUCH greater load on your pump then all boost.

The last time I went to the track this winter I noticed that I was “out of fuel” with my current Supra fuel pump, stock line, Rc960s setup. Just today I purchased a Bosch intank pump which is the largest highest flowing intank pump that you can get for a DSM. I think that should solve my current fueling issue.

 

[iwantawd]

why do you use the stock line?

 

[rdrkt]

why do you use the stock line?

Because Im cheap/I havent found a need to replace it yet. The stock line is about –6 in size. The most restrictive part of the DSM fuel system is the fuel filter/filter to rail line and I replaced that with a Russel filter and -8 line to the rail.

 

[16g-95gsx]

No one mentioned injectors Id imagine because the title of the thread was pumps. DSMlink is about to allow the use of 1600cc injectors with current support of something like 1200 or more CC's, so Id imagine that wouldnt be too large of an issue But I do see what you are getting at with base pressure.

As for spreading mis-information, any of the data I spit out was simply figures quoted from RRE themselves, using VP's own listed specific gravity for C-16 and simple unit conversions in order to get a 12.5:1 lbm ratio between the fueling and air.

 

[rdrkt]

DSMlink is about to allow the use of 1600cc injectors with current support of something like 1200 or more CC's, so Id imagine that wouldnt be too large of an issue

I would think that is a whole other ball of wax. Do you think you are going to be able to reduce the IPW enough to get a proper idle? What do you think atomization is going to be like at that low ass duty cycle? My buddy HighPsi91 runs 1200cc injectors and he seems to do ok although I don’t know if I would want to drive around all the time on injector that large.

As for spreading mis-information, any of the data I spit out was simply figures quoted from RRE themselves, using VP's own listed specific gravity for C-16 and simple unit conversions in order to get a 12.5:1 lbm ratio between the fueling and air.

I don’t know why you thought I was talking about you. You seem to at least be using some facts. Do you have a guilty conscious?

 

[diambo4life]

I agree Dave, that injectors play a big part on the fuel pump's performance. For that reason, I just decided to link the whole article in it's entirety so that everyone can read and digest it.

 

[16g-95gsx]

No guilty conscious here, just since I was spitting figures, and you said "I cant believe the bunk I'm seeing here", I just wasnt sure who exactly you were referring to. Just curious why you'd think that IPW wouldnt be able to be controlled enough to run something like those? There is an updated client for DSMlink actually, and it now has the ability to lower fueling by 75% globally, so 1600cc injectors can in fact be used now. There are a number of guys who are already picking up sets, and at least one that has tested it out and claims to have a decent idle. Large injectors? Most definately. However it looks like they still are able to have enough IPW to not cause a very awkward idle spray pattern, at least enough to not cause complaints as of yet. As for driving around on injectors this large, honestly I dont expect anyone who plans to use injectors that large on a daily driver, so driving around really isnt much of an issue IMO. That capability was more to allow dsmlink users the ability to run even deeper into the 10's, which Id imagine wouldnt make for a street car.

But, even with say 1200cc injectors, you are looking at 288lph on 100% IDC, or 244.8lph before 85% IDC, so Id definately say the pump would be the weak link in a setup like that which you obviously know to be a working setup, so again the issue of fuel pump would be more key.