1999 SC400 vvti Custom Exhaust
#18
#19
I just did my custom bfi mod and let me tell you, it's much more powerful in the highend. I wouldn't bother with the SRT as I feel it wouldn't do much more than what I have now. I paid $5.00 total to a bfi, Lol..
#20
I have all the parts for the BFI sitting in my garage, just need to find the time to do the install.
#23
First of all let me say that is the NICEST workmanship I have seen in a long time. Much better than I am capable of. Would love to have that guy nearby for some projects planned.
Second very nice design with only a couple of things I would have done differently that would IMO made for better performance and saved money.
I would suggest NOT to use the Magnaflow Y pipes. Especially with a skilled craftsman such as this man I would have had him build the rear Y pipe by hand. My problem with the Magnaflows is they have way too much collector volume. This does not help power or torque.
For the front I would NOT cut off the factory Y pipe section. On your design that is what is done and only a short segment of 2.25" is used on each side prior to the Y pipe and the rest of the stock Y pipe 1.97" pipe is used from each cat. This is NOT a problem and in fact I would recommend keeping all of the stock front Y pipe. From there using the 2.5" resonator just like you have is a very good choice.
So, if you or someone else wanted to duplicate this design (which is as good as I have seen except where noted) simply cut the stock front Y pipe right after the stock merge, add the resonator, have a 2.5" into 2.25" merge built to split back into duals (a good fabricator would have no problem with this) and duplicate the balance of the system. On a budget running the stock final mufflers would also be fine.
Again, very nice work
Here is the front section that took a lot of fabrication time that I would not recommend. Just use the stock Y up to the resonator.
Here is the design I suggest for building the second splitting 2.50" - 2.25" merge. (I haven't welded it up yet)
Second very nice design with only a couple of things I would have done differently that would IMO made for better performance and saved money.
I would suggest NOT to use the Magnaflow Y pipes. Especially with a skilled craftsman such as this man I would have had him build the rear Y pipe by hand. My problem with the Magnaflows is they have way too much collector volume. This does not help power or torque.
For the front I would NOT cut off the factory Y pipe section. On your design that is what is done and only a short segment of 2.25" is used on each side prior to the Y pipe and the rest of the stock Y pipe 1.97" pipe is used from each cat. This is NOT a problem and in fact I would recommend keeping all of the stock front Y pipe. From there using the 2.5" resonator just like you have is a very good choice.
So, if you or someone else wanted to duplicate this design (which is as good as I have seen except where noted) simply cut the stock front Y pipe right after the stock merge, add the resonator, have a 2.5" into 2.25" merge built to split back into duals (a good fabricator would have no problem with this) and duplicate the balance of the system. On a budget running the stock final mufflers would also be fine.
Again, very nice work
Here is the front section that took a lot of fabrication time that I would not recommend. Just use the stock Y up to the resonator.
Here is the design I suggest for building the second splitting 2.50" - 2.25" merge. (I haven't welded it up yet)
#24
Thanks jbrady.
I thought the merge on the stock front y pipe was too restrictive?
I actually used the Magnaflow Y to save money. My first choice was to have Kenny make the Y, but his quality of work is expensive. I do now wish I had spent the extra $.
I have been thinking about headers so I might end up changing it.
I thought the merge on the stock front y pipe was too restrictive?
I actually used the Magnaflow Y to save money. My first choice was to have Kenny make the Y, but his quality of work is expensive. I do now wish I had spent the extra $.
I have been thinking about headers so I might end up changing it.
#26
Thanks jbrady.
I thought the merge on the stock front y pipe was too restrictive?
I actually used the Magnaflow Y to save money. My first choice was to have Kenny make the Y, but his quality of work is expensive. I do now wish I had spent the extra $.
I have been thinking about headers so I might end up changing it.
I thought the merge on the stock front y pipe was too restrictive?
I actually used the Magnaflow Y to save money. My first choice was to have Kenny make the Y, but his quality of work is expensive. I do now wish I had spent the extra $.
I have been thinking about headers so I might end up changing it.
The headers will definitely wake up the car even more.
#27
Obviously this craftsman has the skills to build whatever header design one would like. That said it would be expensive. On engines such as ours with very short valve timing and virtually no overlap the need for "tuned" long tube headers is low compared to a long duration valve timing engine. What is needed are headers that keep velocity high while allowing more peak flow.
#28
Obviously this craftsman has the skills to build whatever header design one would like. That said it would be expensive. On engines such as ours with very short valve timing and virtually no overlap the need for "tuned" long tube headers is low compared to a long duration valve timing engine. What is needed are headers that keep velocity high while allowing more peak flow.
Unfortunately I don't think I could afford them.
The headers and exhaust on his mint V8 TVR is amazing!
I have been considering the IMF headers.
jbrady, what is you opinion on these?
#29
I don't know how close they will come to your downpipes. They do eliminate using the cats in the stock locations. I would prefer slightly smaller tube sizes but everything is a compromise and for the price the IMF parts are hard to beat. If I had an SC400 I would probably go with them. If the outlets need modifying I would actually change the collectors but that will cost as much as the headers themselves. I would also relocate the stock cats under the car in the Y pipe. I am sure your craftsman will have no problem with making any changes although he may not want to do the actual install.
#30
Obviously this craftsman has the skills to build whatever header design one would like. That said it would be expensive. On engines such as ours with very short valve timing and virtually no overlap the need for "tuned" long tube headers is low compared to a long duration valve timing engine. What is needed are headers that keep velocity high while allowing more peak flow.