GlennK Posted February 8, 2016 Share Posted February 8, 2016 Guys, I need to decide on a smaller faster spooling turbo or a bigger top end one...All the dynos I see for the 6870 show they only make 430whp at 4500rpm...my old BW366 made that at 3900rpm...So has anyone got a dyno for the 6466 showing if it can beat that to 5000rpm? Cheers. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 8, 2016 Share Posted February 8, 2016 This is our 6466DBB GEN2 1.00A/R with standard head with SRD 264 cams, spools a little quicker on the road due to the 3600rpm hi stall torque converter slipping on the dyno. Hope this helps. Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 8, 2016 Author Share Posted February 8, 2016 Chris, yes it does thanks.Looks like it makes around 248 hp at 4200rpm? what boost were you running? Did you consider a 0.81 A/R? Quote Link to comment Share on other sites More sharing options...
Lee P Posted February 8, 2016 Share Posted February 8, 2016 Deans 6466 gen 2 1.00 AR on pump fuel 427 ftlbs at 4000rpm Quote Link to comment Share on other sites More sharing options...
Lee P Posted February 8, 2016 Share Posted February 8, 2016 It's only because of the high stall and the fact the dyno doesn't load the car like the road The hub dyno will give an accurate power curve and now has a stock TC 1.00ar is perfect Chris, yes it does thanks.Looks like it makes around 248 hp at 4200rpm? what boost were you running? Did you consider a 0.81 A/R? Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 8, 2016 Author Share Posted February 8, 2016 Ok. Thanks Lee Quote Link to comment Share on other sites More sharing options...
jcbt Posted February 8, 2016 Share Posted February 8, 2016 Glenn Ours will be on the hub dyno in the next week or so and that will give you a much better comparison. Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 8, 2016 Author Share Posted February 8, 2016 Very helpful. What will you be running - pump fuel? And what boost will you be going to? Cheers. Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 8, 2016 Share Posted February 8, 2016 Very helpful. What will you be running - pump fuel? And what boost will you be going to? Cheers. Pump fuel Ethanol Not sure what boost, will leave that to Lee. Wont be too much as still stock engine. Maybe 1.6/1.7bar Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted February 10, 2016 Share Posted February 10, 2016 Mine peaked at 1.7 bar and wouldn't run higher, but that may be down to large pipework and a very efficient engine as I think the Baileys had higher boost spikes a while ago. Do you want me to dig out the ethanol graph for mine Glenn? Bit more lively with a 60% mix and was done straight after the run Lee already posted Quote Link to comment Share on other sites More sharing options...
Supraleeturbo Posted February 10, 2016 Share Posted February 10, 2016 All you need is a HKS T51 and all your problems will be solved Hehehehebe I like the sound of this new 6870 to be honest Glenn, but leep is turbo Yoda so he will put you in the right direction Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 10, 2016 Share Posted February 10, 2016 Mine peaked at 1.7 bar and wouldn't run higher, but that may be down to large pipework and a very efficient engine as I think the Baileys had higher boost spikes a while ago. Do you want me to dig out the ethanol graph for mine Glenn? Bit more lively with a 60% mix and was done straight after the run Lee already posted I remember Lee saying ours used to spike abit im 2nd gear, so he took some boost out of it to control the boost a touch. Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted February 10, 2016 Share Posted February 10, 2016 I remember Lee saying ours used to spike abit im 2nd gear, so he took some boost out of it to control the boost a touch. I thought I remember a thread appearing when you had a slight issue causing the boost to spike. Think it was the boost solenoid or map sensor or something? May be just making the whole thing up in my head but I'm sure at the time my first thought was "maybe I can run more boost!?" Lol Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted February 10, 2016 Share Posted February 10, 2016 (edited) I thought I remember a thread appearing when you had a slight issue causing the boost to spike. Think it was the boost solenoid or map sensor or something? May be just making the whole thing up in my head but I'm sure at the time my first thought was "maybe I can run more boost!?" Lol Ahh yeah the Peirburg boost solenoid failed and got stuck in the open position, allowing the turbo to make as much boost as possible hence why we kept having a kangaroo effect, we would make boost then loose all boost because the Syvecs noticed a fault. We kept popping intercooler pipes everytime we came on boost, it got that bad we split the silicone joiner and blew the arch liner to pieces! luckly the Syvecs had a boost cut at 2bar otherwise it could have ended very badly for our engine! Edited February 10, 2016 by Chris Bailey (see edit history) Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 10, 2016 Share Posted February 10, 2016 My 6766 made 520 rhhp / 607 ftlbs @ 4500 and 650 rhhp / 690 ftlbs at 5000 rpm. Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 10, 2016 Author Share Posted February 10, 2016 Yeah please Budz - Thanks Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 10, 2016 Author Share Posted February 10, 2016 My 6766 made 520 rhhp / 607 ftlbs @ 4500 and 650 rhhp / 690 ftlbs at 5000 rpm. Luc, I saw a post that the 6766 was better at lower rpm than the 6866 - 520rhhhp at 4500 is nice though. On 85% Ethanol? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 10, 2016 Share Posted February 10, 2016 You cannot compare the 6466 with a 6870 turbo Glenn. 200 bhp difference in peak power will move the tq curve to the right. Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 10, 2016 Author Share Posted February 10, 2016 Ahh yeah the Peirburg boost solenoid failed and got stuck in the open position, allowing the turbo to make as much boost as possible hence why we kept having a kangaroo effect, we would make boost then loose all boost because the Syvecs noticed a fault. We kept popping intercooler pipes everytime we came on boost, it got that bad we split the silicone joiner and blew the arch liner to pieces! luckly the Syvecs had a boost cut at 2bar otherwise it could have ended very badly for our engine! Been there . Done that. Blew the IC lower pipe a few years ago. Ryan recorded a big spike of around 2.5b or slightly more I think. It was an impressive dyno up till that point though Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 10, 2016 Share Posted February 10, 2016 Luc, I saw a post that the 6766 was better at lower rpm than the 6866 - 520rhhhp at 4500 is nice though. On 85% Ethanol? On E50. On E85, I guess it would have even been a bit quicker spooling. Quote Link to comment Share on other sites More sharing options...
GlennK Posted February 10, 2016 Author Share Posted February 10, 2016 You cannot compare the 6466 with a 6870 turbo Glenn. 200 bhp difference in peak power will move the tq curve to the right. You're correct- but if it moves to the right by 1000+rpm then for my track application it may be hard work to keep it in the power sweet spot - particularly as I'm running the SRD autobox...paddle shifting all the time means my fingers will tire out before the race ends... Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 10, 2016 Share Posted February 10, 2016 Been there . Done that. Blew the IC lower pipe a few years ago. Ryan recorded a big spike of around 2.5b or slightly more I think. It was an impressive dyno up till that point though Your Peirburg solenoid failed too? Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 10, 2016 Share Posted February 10, 2016 Very honestly : I doubt a 6870 is suited for track applications. It's a 1000+ monster ; rolling races and half mile events are its domain. - - - Updated - - - If tracking my Supra, I would go for a 6466. Quote Link to comment Share on other sites More sharing options...
j_jza80 Posted February 10, 2016 Share Posted February 10, 2016 Very honestly : I doubt a 6870 is suited for track applications. It's a 1000+ monster ; rolling races and half mile events are its domain. - - - Updated - - - If tracking my Supra, I would go for a 6466. Personally, I don't know why you'd need anything bigger than a 6266 gen2 in a road car, big power and a decent powerband. Quote Link to comment Share on other sites More sharing options...
Luxluc Posted February 10, 2016 Share Posted February 10, 2016 Personally, I don't know why you'd need anything bigger than a 6266 gen2 in a road car, big power and a decent powerband. What setup are you running? Quote Link to comment Share on other sites More sharing options...
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