Wheatley Posted February 5, 2011 Report Share Posted February 5, 2011 (edited) Ok guys,I figured I would start a new thread with the dyno results going from the factory truck intake manifold to the Fast LSXRT 102mm manifold. An LS3/LS7 90mm throttle body was used along with the X link.It works very well,no problems The only changes were the manifold,throttle body and removed MAF sensor (Speed Density) All pulls were done in 3rd gear TCC locked If you wonder about the hp falling off at 6600RPM about 15hp,we ran into 2 degrees of KR and that was the result.LOL I will be back in a few weeks with more results. The heads are still the factory 243's milled .035,ports are untouched. Hopefully this will help some of those who have been wondering how well this manifold really works Here are the mods 6.0 LQ4 Kooks longtube headers Heads mentioned above Comp 228 232 Fast Lsxrt 102 Performabuilt Level 2,PI 36-3800 triple disk and 4.10's Factory truck manifold SAE 392.77 Rwhp 391.61 Rwtq STD 402hp 401tq Fast LSXRT 102mm SAE 420.00 Rwhp 407.39 Rwtq STD 432hp 416tq I really wish this graph was not missing a big Chunk Here are the graphs before and after Edited February 6, 2011 by Wheatley (see edit history) Quote Link to comment Share on other sites More sharing options...
mcmahan Posted February 5, 2011 Report Share Posted February 5, 2011 Thats amazing numbers Charlie great work as always sir. I am always impressed with you. A little heads up your prob gonna hate me but soon as I get back from Korea I will have alot for you to do Thanks for sharing with us. Justin Quote Link to comment Share on other sites More sharing options...
idahoBLKss Posted February 5, 2011 Report Share Posted February 5, 2011 great info... need to get one thats boosted and do this... Quote Link to comment Share on other sites More sharing options...
Krambo Posted February 5, 2011 Report Share Posted February 5, 2011 Charlie, what tuning changes did you do after the install? Asuming a little fueling and possibly some idle tweeks? Quote Link to comment Share on other sites More sharing options...
jon1178 Posted February 5, 2011 Report Share Posted February 5, 2011 Are these intake manifolds a direct bolt? I really want to get rid of this but ugly stock manifold and a couple extra hp would also be nice. My warranty is up in march so I figured I will start doing a little more tinkering. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted February 5, 2011 Report Share Posted February 5, 2011 Nice numbers Charlie! Quote Link to comment Share on other sites More sharing options...
rojo_143 Posted February 5, 2011 Report Share Posted February 5, 2011 According to their website write up it is suppose to just be a bolt in and plug and play we can even retain our factory throttle body with an adapter if you would like.Correct me if I am wrong but I believe the only thing that is required to change is the fuel rails correct??? Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 6, 2011 Report Share Posted February 6, 2011 (edited) Nice gains.... Was the stock truck intake the one used on the 99-06 models or the TBSS style thats used on the 07 up 4.8's and 5.3's? Edited February 6, 2011 by broke1 (see edit history) Quote Link to comment Share on other sites More sharing options...
Bear Posted February 6, 2011 Report Share Posted February 6, 2011 Nice gains.... Was the stock truck intake the one used on the 99-06 models or the TBSS style thats used on the 07 up 4.8's and 5.3's? The previous dyno numbers were with the "stock" to his truck 78mm intake manifold. Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 6, 2011 Report Share Posted February 6, 2011 The previous dyno numbers were with the "stock" to his truck 78mm intake manifold. So that means the stock 99-06 truck intake was used?Not the TBSS style intake? Quote Link to comment Share on other sites More sharing options...
Wheatley Posted February 6, 2011 Author Report Share Posted February 6, 2011 Thanks guys That is correct the factory 99-07 classic 78mm truck manifold was used before. You can use the factory fuel rails with the rail kit you can get from fast. I am about to order the fast billet rails. Kevin,Yes I got rid of the MAF while I was at it,so the VE needed work,Base idle airflow,spark ect. Transient fuel on closed throttle really needed some work as well as alittle bit at throttle tip in. I went to Chevrolet and got an IAT sensor for an F body as well as the pigtail and relocated the IAT Sensor The idle is very solid and stable. Quote Link to comment Share on other sites More sharing options...
broke1 Posted February 6, 2011 Report Share Posted February 6, 2011 Kind of misleading saying you gained XX HP just by bolting on the FAST when you also deleted another restriction aka the mass air flow meter. Im no tuner myself but ive seen many tuners say 10-20hp at the wheels going to speed density.....Im sure youve tuned enough of them to know Charlie,how much of a gain from going speed density?Just average from what youve seen? Quote Link to comment Share on other sites More sharing options...
Wheatley Posted February 6, 2011 Author Report Share Posted February 6, 2011 (edited) Sorry,the MAF was taken out of the loop,so it is tuned Speed Density. The Before dyno run using the factory truck intake and factory 78mm throttlebody was also tuned speed density,however the MAF was still installed at that time. Sorry I should have been more clear Edited February 6, 2011 by Wheatley (see edit history) Quote Link to comment Share on other sites More sharing options...
Cramer Posted February 6, 2011 Report Share Posted February 6, 2011 I wonder how the low end would gain with a 224 cam on a 112lsa??? If that would bring the peak down about 600-800rpms and flat line till around 6200 I might have to get one. What injectors are you running with that? BTW very nice numbers. Quote Link to comment Share on other sites More sharing options...
shadowsniper3006 Posted February 6, 2011 Report Share Posted February 6, 2011 "The heads are still the factory 243's milled .035,ports are untouched" wow isn't that like a 58cc head then? What is the lift on the cam and did you check PTV clearance? Nice numbers for sure, have you thought about porting it now and doing the test again? that would be great to know if porting them is worth it a small cube motor. Quote Link to comment Share on other sites More sharing options...
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