30lbs on a 408 ok??
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30lbs on a 408 ok?? I have svo 30lbs injectors now but i am not sure if they will feed a 408 that should make rwhp in the 550 range. A few places said it would be no problem but i would really like to be sure, Thanks Shawn
i've fixed many speedinc tunes, and trust me, you do not want to take them as the example of a job well done. i'm not gonna give any more expamples, or the corporate ******, 'scuse me, moderators, will lock this thread.
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TSP & Thunder said 30lbs would be better due to the fact that it would give a nicer spray pattern and that it's better to run the injector at 85% duty than to run a 42 at a less duty cycle. BTW They also both knew i was looking to purchase the 42lb injectors and they still said stay with your 30lbs
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if it truly peaks at 85% then great. remember that you can have +/-10% difference on weather alone (i seen it myself, amazed the hell out of me) so don't run it too close to the edge.
but if it's 85% on a low day, and 96% on a high day, then i'd go bigger. call me paranoid, or cheap, but i prefer not to lean out my engine at 6500rpm
but if it's 85% on a low day, and 96% on a high day, then i'd go bigger. call me paranoid, or cheap, but i prefer not to lean out my engine at 6500rpm
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Brett Foote well, i have tuned a 9sec car that had 30s, but that's because of a big direct shot...
ddnspider: i couldn't agree with you more, i try to stay away from such statements myself as i hate creating 'forum noise' with flamewars.
this is my argument:
svo42s are ~50bux more than svo 30s. most ls1 guys want to go over 400rwhp, for which you will need these 42s. there are very few people that actually fit the svo30 profile. i do, because i am sticking to my dinky cam, and don't give a **** about dyno figures.
so, if you build yourself a 408, you probably at that point dipped 15-20k into your mods alone, so WHY THE **** WOULD YOU WANT TO BLOW IT UP BECAUSE YOU WANNA SAVE 50 bux?!?!?!
sorry, had to vent on that.
ddnspider: i couldn't agree with you more, i try to stay away from such statements myself as i hate creating 'forum noise' with flamewars.
this is my argument:
svo42s are ~50bux more than svo 30s. most ls1 guys want to go over 400rwhp, for which you will need these 42s. there are very few people that actually fit the svo30 profile. i do, because i am sticking to my dinky cam, and don't give a **** about dyno figures.
so, if you build yourself a 408, you probably at that point dipped 15-20k into your mods alone, so WHY THE **** WOULD YOU WANT TO BLOW IT UP BECAUSE YOU WANNA SAVE 50 bux?!?!?!
sorry, had to vent on that.
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This was not about any money 
I called to order the injector's and told them i ALLREADY have the 30lbs SVO's and i wanted 42's and they both said it was not needed and this is why i'm here
I called to order the injector's and told them i ALLREADY have the 30lbs SVO's and i wanted 42's and they both said it was not needed and this is why i'm here here's my solution for you: scan your car when it's healthy, on a day with good air, see your duty cycles, decide what's good for you, what your comfort levels are.
it is weird that a company wouldn't want to sell you more stuff though.
it is weird that a company wouldn't want to sell you more stuff though.
redhardsupra..thats exactly what i was think when u said u sprayed.....hell in a wet kit you dont need bigger injectors since extra fuel comes from the nozzle!
destroyer....ask around instead of just 1 company....call a company(ie a sponsor that specficically deals with LS1 stuff preferrably a company that mostly does either FI or N20 or injector sales and see what they say)
destroyer....ask around instead of just 1 company....call a company(ie a sponsor that specficically deals with LS1 stuff preferrably a company that mostly does either FI or N20 or injector sales and see what they say)
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Originally Posted by ddnspider
redhardsupra..thats exactly what i was think when u said u sprayed.....hell in a wet kit you dont need bigger injectors since extra fuel comes from the nozzle!
destroyer....ask around instead of just 1 company....call a company(ie a sponsor that specficically deals with LS1 stuff preferrably a company that mostly does either FI or N20 or injector sales and see what they say)
destroyer....ask around instead of just 1 company....call a company(ie a sponsor that specficically deals with LS1 stuff preferrably a company that mostly does either FI or N20 or injector sales and see what they say)
start with this:
to find the fuel requirements take your horsepower and muliply it by a BSFC(brake specific fuel comsumption) ie 550X.5(for NA streetcar)=275lbhr of fuel divide by # of injectors ie 8 so 275/8=34.375lb/hr. now explain how a 30# injectors will product that value without pushing it too much?very easy to solve.math is your friend when it comes to motors
to find the fuel requirements take your horsepower and muliply it by a BSFC(brake specific fuel comsumption) ie 550X.5(for NA streetcar)=275lbhr of fuel divide by # of injectors ie 8 so 275/8=34.375lb/hr. now explain how a 30# injectors will product that value without pushing it too much?very easy to solve.math is your friend when it comes to motors
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Originally Posted by ddnspider
start with this:
to find the fuel requirements take your horsepower and muliply it by a BSFC(brake specific fuel comsumption) ie 550X.5(for NA streetcar)=275lbhr of fuel divide by # of injectors ie 8 so 275/8=34.375lb/hr. now explain how a 30# injectors will product that value without pushing it too much?very easy to solve.math is your friend when it comes to motors
to find the fuel requirements take your horsepower and muliply it by a BSFC(brake specific fuel comsumption) ie 550X.5(for NA streetcar)=275lbhr of fuel divide by # of injectors ie 8 so 275/8=34.375lb/hr. now explain how a 30# injectors will product that value without pushing it too much?very easy to solve.math is your friend when it comes to motors
Again this is what i have been told 
if thats true than itd make it near 100% duty cycle and then throw in conditions and BAM your over 100% duty cycle.trust me go bigger.what happens if u get the 30s find out theyre too small,then u gotta sell a used set of injectors and buy another set of larger ones whereas u could have just got the bigger set for not much more the first time.
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Originally Posted by ddnspider
if thats true than itd make it near 100% duty cycle and then throw in conditions and BAM your over 100% duty cycle.trust me go bigger.what happens if u get the 30s find out theyre too small,then u gotta sell a used set of injectors and buy another set of larger ones whereas u could have just got the bigger set for not much more the first time.
At this point it better make 600 rwhp