JamieP Posted August 29, 2008 Share Posted August 29, 2008 good to compare graphs like this, at 4500rpm you are at about 270bhp and im over 400bhp then at 5500rpm you romp past me, CAMS Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 Lol, must be! The car is still very drivable even with the cams though which is good, because I didn't want a car that was twitchy. What cams are you running Jamie? Quote Link to comment Share on other sites More sharing options...
JamieP Posted August 29, 2008 Share Posted August 29, 2008 Stock cams, its holding back the big numbers but for now i like the extra midrange, might get bored soon though:D Quote Link to comment Share on other sites More sharing options...
jevansio Posted August 29, 2008 Share Posted August 29, 2008 So what is it, DBB & stock cams giving Jamie low down response but limiting overall power, while the cams letting the full power of bonus T67 let rip top end? Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 Not sure to be honest. Ryan said that the fact I have had a lot of head work done too might be a factor also. Had my head fully ported and polished, all of the chambers are matched, and the valve guide has been ground down too I think so not to obstruct flow (don't quote me on that, but I think that is what was done). My inlet plenum and runners were also ported and polished to match. I will try to find some picks and put them up. Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 There are some pictures of the head before it was reassembled. You can sort of see some of the polishing work that was done, sorry for the low quality, it's from my camera. My mate tells me that the valves were all swirl polished too. Quote Link to comment Share on other sites More sharing options...
TRD DAN Posted August 29, 2008 Share Posted August 29, 2008 Not sure to be honest. Ryan said that the fact I have had a lot of head work done too might be a factor also. Had my head fully ported and polished, all of the chambers are matched, and the valve guide has been ground down too I think so not to obstruct flow (don't quote me on that, but I think that is what was done). My inlet plenum and runners were also ported and polished to match. I will try to find some picks and put them up. thats what looks like has been done , looks a nice job to. i know they say supra's are fairly good flowing but i have seen a few that with a nise polish would benefit i am having full port and polish done wtih my new head also 3 angled valve seats cut to see if any benefits can be had there Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 thats what looks like has been done , looks a nice job to. i know they say supra's are fairly good flowing but i have seen a few that with a nise polish would benefit i am having full port and polish done wtih my new head also 3 angled valve seats cut to see if any benefits can be had there Cool, let us know when you have it on, and what difference it makes to the car It's interesting to see what works, and to what extent. I heard in the past that too about the Supra head, and that it wasn't worth going to all the hassle, but I thought at the time when it was off, that I may as well. Quote Link to comment Share on other sites More sharing options...
TRD DAN Posted August 29, 2008 Share Posted August 29, 2008 yes i think price sometimes puts people of as it quite labour intensive with porting and polishing but i will deffinatley be having it done , as a good freind of mine builds race engine's so mates rates come into play Quote Link to comment Share on other sites More sharing options...
paul mac Posted August 29, 2008 Share Posted August 29, 2008 Yeah, mine looks like it doesn't start to really spool until 500 rpm later than yours Jamie! Why would that be Ryan? a 1.6mm head gasket wont help, what is the eventuall boost figure you are looking at ? Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 a 1.6mm head gasket wont help, what is the eventuall boost figure you are looking at ? Ah yeap good point. I'm not looking at any evential boost figure, just going on what Ryan tells me is a safe level for the modifications I have done. Originally when I bought the kit from Dusty, this is what I was advised to go with, so the engine was built with a 1.6mm gasket. I had no boost level in my mind at all. Quote Link to comment Share on other sites More sharing options...
paul mac Posted August 29, 2008 Share Posted August 29, 2008 Ah yeap good point. I'm not looking at any evential boost figure, just going on what Ryan tells me is a safe level for the modifications I have done. Originally when I bought the kit from Dusty, this is what I was advised to go with, so the engine was built with a 1.6mm gasket. I had no boost level in my mind at all. with a DBB i would have expected a lot more mid range punch, looking at the spec i would say the head gasket and potentially your plenum mods and the head porting have all contributed to push the power up the rev range, its an impresive top end figure though Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 29, 2008 Author Share Posted August 29, 2008 Thanks mate, I'm a happy bunny with it Quote Link to comment Share on other sites More sharing options...
jevansio Posted August 29, 2008 Share Posted August 29, 2008 with a DBB i would have expected a lot more mid range punch, looking at the spec i would say the head gasket and potentially your plenum mods and the head porting have all contributed to push the power up the rev range, its an impresive top end figure though Reading between the lines you'd prefer the drive of Jamies? Quote Link to comment Share on other sites More sharing options...
supra_surj Posted August 30, 2008 Share Posted August 30, 2008 Nice one mate! Very good figures you have! Looks like I have abit of catching up to do with you big boys. Still need to contact your mate regarding my paint job. Posted via Mobile Device Quote Link to comment Share on other sites More sharing options...
Nic Posted August 30, 2008 Share Posted August 30, 2008 Wow, we have the same turbo and there is a huge difference where they come online. http://i30.photobucket.com/albums/c338/jamie450x/jpvbonus.png Should that read DBB on both cars? Quote Link to comment Share on other sites More sharing options...
Marty Posted August 30, 2008 Share Posted August 30, 2008 Excellent result mate looks to be making cracking power, bet its an animal to drive Hoping to get a very similar result out of mine at 1.4-1.5 bar if Michel ever gets back to me about mapping. Mine doesn't have the headwork yours has though, just cams, so may be slightly less, be interesting to see Quote Link to comment Share on other sites More sharing options...
bonus_2000 Posted August 30, 2008 Author Share Posted August 30, 2008 Should that read DBB on both cars? Yeah think that should be, mine is DBB Nice one mate! Very good figures you have! Looks like I have abit of catching up to do with you big boys. Still need to contact your mate regarding my paint job. Posted via Mobile Device Yeah well pleased mate! Let me know about the paint fella, I can speak to my mate for you Excellent result mate looks to be making cracking power, bet its an animal to drive Hoping to get a very similar result out of mine at 1.4-1.5 bar if Michel ever gets back to me about mapping. Mine doesn't have the headwork yours has though, just cams, so may be slightly less, be interesting to see Yeah that will be interesting. It's a bit of a handful, but puts a smile on my face Oh and it sounds beautiful! Quote Link to comment Share on other sites More sharing options...
paul mac Posted August 30, 2008 Share Posted August 30, 2008 Reading between the lines you'd prefer the drive of Jamies? yes i would, but its each to their own Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted August 30, 2008 Share Posted August 30, 2008 Should that read DBB on both cars? Well spotted Nic Have edited Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted August 30, 2008 Share Posted August 30, 2008 yes i would, but its each to their own See im not sure which i would prefer as Jamie's car comes in very hard low down but then its a gradual pull. Where as Bruce's comes in still hard but just rips you back in the seat all the way to the redline. Ryan Quote Link to comment Share on other sites More sharing options...
Guest flipper Posted August 30, 2008 Share Posted August 30, 2008 (edited) Jamies will be better for the road and track which would be my choice..... as some-one said...each to their own.. for me the other set up is like giving the Pope a Large member and is just an engineering exercise. But I have spent over 15 years track racing and like what I know.... My mate has a 780 bhp GTO, 800 bhp evo 6 and a 650 bhp GTR34 (well paid job) all good toys but too tempramental and you cant lay down/utilise it apart from straight line....anyway I will shut up Edited August 30, 2008 by flipper (see edit history) Quote Link to comment Share on other sites More sharing options...
Nic Posted August 30, 2008 Share Posted August 30, 2008 For me it is about speccing the car around the type of driving you do on a daily basis. On the roads I drive here (mainly urban single or dual carriageways) I am never left wanting for more hp as I just do not have the roads to use it. Big hp bragging rights don't bother me, response, useable power, handling and reliability, were the priorities when speccing my own setup. Quote Link to comment Share on other sites More sharing options...
stupra Posted August 30, 2008 Share Posted August 30, 2008 Good power figure's mate, I bet your over the moon. Nice job again Ryan. . I like the way it make's power, i've found with to much explosive power down low traction can be a bigger issue than a little bit of extra lag, but that's only IMO. Quote Link to comment Share on other sites More sharing options...
TLicense Posted August 30, 2008 Share Posted August 30, 2008 It reminds me a little of the differenece between mine and Ryans cars. Ryans car made 567bhp (IIRC) and mine made 561bhp. However Ryans car made the horsepower a lot earlier than mine. It felt quick don't get me wrong but you didn't get the kind of mid-range punch as the turbo's came on that mine did. However, we did a few side by side 70+ pulls one day, unless I was on song he pulled away from me by 3 / 4 car lengths as my turbo's spooled up. Once I was on boost there was absolutely nothing in it. That all said, the turbo's I've got a far, far more biased towards top end than the turbo that he was running, so it really is horses for courses. Good numbers there mate, might not be as quick as others in the mid-range, but it will "feel" a lot quicker when it comes on song, and will romp most on here at the top end. Well done fella. Quote Link to comment Share on other sites More sharing options...
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